Angelfish Care Guide: Pterophyllum scalare for UK Aquarists

The Freshwater Angelfish (Pterophyllum scalare) is one of the most recognisable and sought-after cichlids in the UK hobby, and it has held that status for decades. We currently stock angelfish variants in our UK shop — from wild-type silvers to patterned varieties. This is the complete angelfish care guide I write and update based on years of keeping and selling this species — covering everything from angelfish tank size and water chemistry to angelfish tank mates, diet, breeding, and the mistakes I see hobbyists make most often. Every claim in this guide is backed by cited sources at the bottom — FishBase^[1] for scientific data, Seriously Fish^[2] for hobbyist-verified care information, and my own notes from keeping and breeding the species.

Angelfish are one of the few freshwater species that genuinely deserve the word "elegant". The tall, laterally compressed body of Pterophyllum scalare with its long trailing fins creates a presence in a planted aquarium that few other fish can match. They have been a centrepiece species in the hobby since the 1920s, and after fifteen years of keeping them in UK conditions I still think they are the best choice for a well-planned mid-sized community tank.

Adults reach around 15 cm body length and over 20 cm from dorsal to anal fin tip. Lifespan is typically 8-10 years with good care, and their personality — inquisitive, aware, and often interactive with their keeper — is what sets them apart from most community fish. The rest of this guide covers tank size, water parameters, feeding, tank mates, and breeding in detail, with honest answers at the end to the questions I get asked most often.

Classification

• Order: Cichliformes

• Family: Cichlidae

• Genus: Pterophyllum

  Pterophyllum scalare is the most widely kept species in the Pterophyllum genus, which also includes the less common P. altum (Altum Angelfish) and P. leopoldi (Leopold's Angelfish). Within the trade, scalare has been selectively bred into dozens of colour and finnage varieties — silver, marble, koi, black, platinum, zebra, veil-tail, and more — but they are all the same species with the same care requirements. Angelfish sit within the Cichlidae family, which explains their more complex behaviour compared with simple shoaling species.

Where Do Angelfish Come From? Natural Habitat Explained

The natural Pterophyllum scalare habitat spans a vast range across the Amazon Basin in South America, including tributaries in Peru, Colombia, Brazil, and Guyana. In the wild, this angelfish species lives among dense vegetation, submerged roots, and fallen branches in slow-moving rivers, floodplain lakes, and swampy areas. The water is typically warm, soft, and slightly acidic, with tannin staining from decaying leaves reducing light penetration.

Their laterally compressed body shape is an adaptation to navigating through dense aquatic vegetation and root tangles — a tall, thin profile slips easily between vertical stems and branches where rounder-bodied fish would struggle. This is why planted aquariums with vertical structure suit them so well in captivity. In the wild, they use this body shape as camouflage too, hanging motionless among vertical plant stems where the dark barring on their body breaks up their outline.

Wild angelfish are ambush predators as well as opportunistic omnivores. They feed on small invertebrates, insect larvae, tiny fish fry, and organic matter. That natural feeding behaviour explains why they will eventually eat any tank mate small enough to fit in their mouth, and why a varied angelfish diet works best in captivity. They are adapted to stable, warm water conditions and do not tolerate sudden parameter swings well, which is why careful maintenance and consistent water quality are central to good angelfish care.

Expert Tip

Mimicking the natural habitat of Angelfish with tall plants, vertical driftwood, subdued lighting, and dark substrate often improves colour, reduces aggression, and encourages natural behaviour. Fish moved from a bare quarantine tank into a well-planted layout usually become calmer and display better finnage within days.

How to Set Up the Perfect Tank for Angelfish

A thoughtful angelfish tank setup is crucial because these are not small fish and they have specific spatial needs. The minimum angelfish tank size is 120 litres for a pair, but that should be treated as the absolute floor. For a small group or a community tank, 200-300 litres is far more practical and gives these fish the room they need to establish territories without constant conflict. If this is your first serious aquarium, read our first tropical tank guide first — angelfish are not a beginner species, and they need a fully cycled, stable tank before they arrive.

Tank Size Requirements

The most important dimension for angelfish is height. Their tall body shape — dorsal to anal fin easily reaching 20 cm or more — means they need a tank that is at least 45 cm tall, ideally 50 cm or more. Standard 60 cm long tanks that are only 30 cm tall are unsuitable even if the volume looks adequate. A 120-litre tank with a 45 cm height works for a pair. For a group of 4-6 juveniles (which is how most hobbyists start), plan for 200+ litres so the fish have room to grow and pair off without being crowded.

For a dedicated angelfish display, a 200-litre tall tank creates a striking centrepiece. For an angelfish community tank setup with bottom dwellers and mid-level schooling fish, aim for 250-300 litres so every species has adequate space. This is why many aquarists who plan a proper angel fish display choose tanks specifically marketed as "tall" or "extra high" models.

Water Parameters

The ideal temperature for angelfish is 26-28 °C, though the full Pterophyllum scalare temperature range is 24-30 °C. They are a genuinely warm-water species — cooler temperatures below 24 °C can suppress immune function and make them susceptible to disease. Stable angelfish temperature matters more than hitting an exact number, so avoid daily swings.

The recommended angelfish pH range is 6.0-7.5, with most captive-bred fish doing well around pH 6.5-7.0. Angelfish water hardness should stay soft to moderately soft, ideally 3-8 dGH. These are the core angelfish water parameters to aim for: temperature 26-28 °C, pH slightly acidic to neutral, and low to moderate hardness. Captive-bred angelfish are more adaptable than wild-caught, but they still do best in softer water.

120L+ Minimum tank

26-28 °C Ideal temperature

6.0-7.5 pH range

3-8 dGH Hardness

Filtration

Angelfish need clean, well-oxygenated water with moderate flow. Strong current is not ideal because their tall fins create drag, and they naturally occupy calmer water. A canister filter or large internal filter with a spray bar to diffuse flow works well. Sponge pre-filters protect fry if you breed them. Good filtration is a major part of angelfish disease prevention because poor water quality is the primary trigger for bacterial infections and fin rot in this species.

Substrate

Fine sand or smooth gravel works well. Dark substrates bring out the best colour contrast, especially in silver, marble, and koi varieties where the dark barring stands out against a dark background. Avoid sharp or coarse substrates that could damage the trailing ventral fins when the fish forage near the bottom.

Plants & Decor

Angelfish and planted aquariums are a natural pairing. Use tall-growing plants that complement their vertical body shape — Amazon swords (Echinodorus species), Vallisneria, tall Cryptocoryne, and stem plants like Hygrophila all work well. Broad-leafed plants serve a dual purpose: they provide cover and reduce aggression, and they also act as spawning sites for breeding pairs. Driftwood and vertical root structures add visual interest and create natural territory boundaries. Leave open swimming lanes in the centre and front of the tank — angelfish are not fish that hide in caves, they patrol open water with confidence.

Lighting Requirements

Moderate lighting works best. Very bright lighting without plant cover may increase stress and aggression, while subdued light with floating plant cover encourages natural behaviour and brings out the metallic sheen on silver varieties. Aim for 7-8 hours daily in newer tanks and 8-10 hours in mature planted systems.

Pro Tip

When buying juvenile angelfish for a group, add them all at the same time into a mature tank. Adding new angels to a tank where others are already established often leads to severe bullying — established fish treat newcomers as intruders and can be relentless.

What Do Angelfish Eat? Complete Feeding Guide

If you have ever asked what do angelfish eat, the answer is: almost anything, eagerly. In the wild, Pterophyllum scalare is an opportunistic predator that feeds on small invertebrates, insect larvae, worms, small fish, and plant matter. In the aquarium, a balanced angelfish feeding guide should include quality flakes or pellets as a staple, supplemented with regular frozen and live foods. A good angelfish diet supports colour, fin growth, immune health, and breeding condition.

Staple Foods

The best daily angelfish food is a high-quality cichlid flake or slow-sinking pellet. Unlike small tetras, angelfish have relatively large mouths for their body size and can handle standard-sized flakes and granules. They are enthusiastic surface and mid-water feeders. Feed what they can finish in 2-3 minutes, twice daily.

Supplemental Foods

To maintain condition and bring out the best colour, offer frozen bloodworm, brine shrimp, daphnia, and mysis shrimp 2-3 times per week. These high-protein foods are especially useful when conditioning pairs for angelfish breeding. Angelfish respond noticeably to a varied diet — fish fed only on flakes often show duller colour and slower growth than those given regular frozen food supplements.

Treats & Conditioning Foods

Live foods — blackworms, earthworm pieces, brine shrimp, and daphnia — are excellent conditioning foods that encourage spawning behaviour. Blanched vegetables like courgette or spinach can also be offered occasionally, though angelfish are more carnivorous than many omnivorous cichlids. If you keep a group and notice a pair forming, increase the frequency of high-protein foods to encourage egg development.

Feeding Frequency & Portion Control

Feed twice daily in moderate portions. Angelfish are greedy and will always act hungry, but overfeeding leads to water quality problems and obesity. A practical angelfish care guide rule is to feed what they can consume in 2-3 minutes per session. In community tanks, watch that angelfish do not monopolise food — they are confident feeders and will outcompete shyer species.

For customers looking at angelfish for sale, newly arrived fish usually begin feeding within 24 hours of settling into a mature tank. If your new angelfish refuse food for more than two days, check water parameters and stress indicators. Once settled, healthy angelfish should feed eagerly at every meal. This is one of the most rewarding parts of angelfish care — they learn to recognise their keeper and often approach the glass at feeding time.

Feeding Warning

Bloodworm is an excellent supplement but should not be fed as the sole diet. Exclusive bloodworm feeding can cause nutritional deficiency and digestive problems. Use it as part of a varied rotation, not as a staple.

What Fish Can Live With Angelfish? Compatibility Guide

The angelfish behaviour profile is semi-aggressive, territorial during breeding, and predatory toward small fish. They are not the worst cichlids for aggression, but they are not peaceful community fish either. Choosing the right angelfish tank mates is one of the most important decisions in setting up a successful angelfish aquarium, and getting it wrong is one of the most common mistakes I see.

Ideal Tank Mates

Good companions are fish that are too large to eat, too fast or armoured to bully, and share similar water parameter preferences. The best angelfish tank mates include:

• Corydoras catfish — peaceful bottom dwellers that stay out of the angelfish's territory
• Bristlenose plecos — armoured, algae-eating catfish that angelfish ignore
• Congo tetras — large enough that adult angelfish cannot eat them
• Rummy-nose tetras — fast mid-water schoolers that are usually too quick to catch
• Rainbowfish — active, similarly sized, and occupy different water levels
• Dwarf gouramis — similar size and temperament in spacious tanks
• Kuhli loaches — nocturnal bottom dwellers that avoid conflict

Species to Avoid

Avoid any fish small enough to be eaten, any fin-nipper, and any highly aggressive species:

• Neon tetras — adult angelfish will eat them; this is one of the most common stocking mistakes
• Cardinal tetras — same problem as neons; too small for adult angelfish
• Tiger barbs — notorious fin-nippers that will shred angelfish fins
• Serpae tetras — another fin-nipping species
• Bettas — long fins attract nipping from angelfish, and territorial conflict is likely
• Large aggressive cichlids — oscars, jack dempseys, and convicts will bully or injure angelfish
• Small shrimp — cherry shrimp and similar species will become expensive snacks

Community Tank Stocking Examples

For a 200-litre planted tank, a pair of angelfish with 8-10 rummy-nose tetras, 6 corydoras, and a bristlenose pleco is a well-balanced community. In a 300-litre setup, a group of 4-5 angelfish with a school of congo tetras and bottom dwellers creates a stunning display. If you want to keep a group, start with 5-6 juveniles and let them pair off naturally — then rehome the extras if aggression becomes a problem as they mature.

Compatibility with Invertebrates

Large shrimp species like amano shrimp may survive with angelfish, but smaller species will be eaten. Nerite snails and other snails are generally safe. If you keep a shrimp breeding colony, angelfish are not a suitable tank mate under any circumstances.

Compatibility Tip

When angelfish pair off for breeding, they become significantly more aggressive toward all tank mates. Even previously peaceful fish will chase and attack anything that approaches their spawning site. In a community tank, have a plan for separating breeding pairs or be prepared for temporary disruption to the community dynamic.

How to Breed Angelfish: Complete Breeding Guide

Angelfish breeding is one of the most rewarding experiences in the freshwater hobby and is achievable for hobbyists with moderate experience. Unlike many egg-scattering species, angelfish are attentive parents that guard their eggs and fry — watching a bonded pair raise a brood is genuinely fascinating. If you are interested in cichlid breeding, angelfish are one of the best species to start with — for a broader look at the family, see our cichlid care guide.

Pair Formation

Angelfish choose their own mates and forced pairings rarely work. The most reliable method is to raise a group of 5-6 juveniles together and let natural pair bonds form as they mature at around 6-8 months. A bonded pair will begin to separate from the group, claim a territory, and clean a spawning surface. Sexing angelfish visually before they spawn is very difficult — the most reliable method is observing breeding behaviour.

Breeding Setup

A bonded pair can breed in a community tank, but survival rates for fry are much higher in a dedicated breeding tank of 80-120 litres. Provide a flat vertical surface for egg laying — a piece of slate leaned against the glass, a broad Amazon sword leaf, a terracotta spawning cone, or even the filter intake tube. Keep the water warm (28-30 °C), soft, and slightly acidic. Condition the pair with high-protein frozen and live foods for two weeks before expected spawning.

Spawning Behaviour

When ready to spawn, the pair intensifies colour, cleans the chosen surface meticulously, and becomes highly territorial. The female makes test passes over the surface before laying rows of adhesive eggs in neat lines. The male follows immediately, fertilising each row. A full clutch can contain 100-400+ eggs depending on the size and condition of the female. The entire spawning process usually takes 1-2 hours.

Egg Care & Hatching

Both parents fan the eggs with their pectoral fins to maintain water flow and remove any that develop fungus. Fertile eggs are translucent amber; infertile eggs turn white and should be removed by the parents (or by the keeper if the parents miss them). Eggs typically hatch in 48-72 hours at 28 °C. The fry remain attached to the spawning surface as "wigglers" for another 3-5 days, absorbing their yolk sacs before becoming free-swimming.

Fry Care & Growth

Free-swimming fry can be fed newly hatched brine shrimp (Artemia nauplii) immediately — this is the single best first food for angelfish fry. Feed small amounts 3-4 times daily and keep the water pristine with gentle sponge filtration and daily small water changes. After 2-3 weeks, introduce crushed flake and micro pellets alongside the brine shrimp. Growth is steady, and young angelfish begin to show their characteristic tall body shape at around 4-6 weeks.

Common Breeding Challenges

First-time parents frequently eat their own eggs or fry. This is normal — most pairs improve over 2-3 spawning attempts. If egg-eating persists, you can remove the spawning surface with the eggs attached and hatch them artificially in a separate container with an airstone and methylene blue to prevent fungus. Other common issues include infertile eggs (often from a same-sex pair, which do occur), fungal infection of the clutch, and fry losses from poor water quality or inadequate first foods.

Advanced Breeding Tip

If you want to maximise fry survival while still allowing natural parental behaviour, use a tank divider. Let the parents guard the eggs on their side, then move the free-swimming fry to the other side once they detach. This gives you the best of both worlds — natural breeding behaviour and protected fry growth.

Common Health Problems in Angelfish & How to Prevent Them

Healthy angelfish are alert, confident, and display strong colour with fully extended fins. They should patrol their territory, feed eagerly, and interact with their surroundings. Poorly kept angelfish may clamp their fins, lose colour, become listless, or develop visible disease signs. Good angelfish disease prevention starts with stable water, proper tank size, and careful quarantine of new arrivals.

Signs of a Healthy Angelfish

Look for erect dorsal and anal fins, smooth unbroken fin membranes, clear eyes, strong body colour, and alert responsive behaviour. A healthy angelfish should approach the front of the tank when you appear and feed confidently. Good angelfish lifespan depends on these basics being maintained consistently over years, not just corrected when problems appear.

Ich (White Spot Disease)

Ich is one of the most common diseases in angelfish, especially after transport stress or temperature drops. It appears as small white spots scattered across the body and fins. Treatment involves raising the temperature to 30-32 °C (angelfish tolerate this well) and, if needed, using a suitable ich medication. Because angelfish prefer warm water naturally, the heat treatment approach is often effective on its own when caught early.

Fin Rot

Bacterial fin rot causes the edges of the fins to become ragged, discoloured, and progressively erode. It is almost always triggered by poor water quality, stress, or physical damage from aggressive tank mates. The first step in treatment is always improving water quality — frequent water changes and testing parameters. Antibacterial treatments may be needed for advanced cases, but clean water alone resolves many early cases.

Angelfish Virus (Angelfish Plague)

This viral condition is specific to angelfish and can cause rapid, devastating losses. Symptoms include excessive mucus production, fin clamping, rapid breathing, loss of appetite, and sudden death — often within 24-48 hours. There is no cure for the virus itself. Supportive care (pristine water, elevated temperature, reduced stress) gives fish the best chance of surviving. Strict quarantine of all new angelfish is the most important prevention measure. This is the primary reason experienced angelfish keepers quarantine religiously.

Hexamita (Hole-in-the-Head)

This parasitic infection can cause small pits or holes to develop around the head and lateral line. It is associated with poor diet, vitamin deficiency (particularly vitamin C), and chronic stress. Treatment involves improving diet variety, adding vitamin supplements, and in severe cases, metronidazole-based medications. Prevention through proper nutrition is far more effective than treatment.

Prevention Tips

Keep the water warm and stable, perform regular 20-25% weekly water changes, feed a varied diet, avoid overcrowding, and quarantine all new fish for 3-4 weeks minimum. Angelfish that are well-maintained in mature, planted aquariums with suitable tank mates rarely develop health problems. Most disease in angelfish traces back to stress from poor conditions, aggressive tank mates, or inadequate quarantine.

Popular Angelfish Varieties

Decades of selective breeding have produced a wide range of angelfish varieties, all derived from the same Pterophyllum scalare species. Care requirements are identical across all varieties — the differences are purely cosmetic. The most commonly available varieties in the UK trade include:

• Silver — the wild-type pattern with a silver body and dark vertical bars; the classic look
• Marble — irregular black and white marbling across the body; no two fish are identical
• Koi — orange, white, and black patterning resembling koi carp; highly popular
• Black — solid dark body with varying degrees of coverage; striking in planted tanks
• Platinum/Gold — pale metallic body with minimal or no barring
• Zebra — enhanced dark barring on a silver base; bold striped pattern
• Veil-tail — any colour pattern with dramatically elongated fin rays; elegant but fragile fins

Veil-tail varieties deserve a special mention because their extended fins make them more vulnerable to fin-nipping tank mates and strong current. If you keep veil-tail angelfish, be especially careful with tank mate selection and flow rate.

Understanding Angelfish Behaviour in the Aquarium

Angelfish behaviour is more complex than most community fish because they are cichlids with genuine social intelligence. They establish hierarchies, form pair bonds, recognise their keeper, and defend territories — especially during breeding. Understanding this behaviour is key to keeping them successfully.

In a group, angelfish establish a pecking order. The dominant fish claims the best territory and the most food, while subordinate fish may be chased to the tank's edges. In a tank that is too small, this hierarchy becomes oppressive and the lowest-ranked fish can be bullied to death. This is why adequate tank size and visual barriers (plants, wood) are so important — they allow subordinate fish to break line of sight and avoid constant harassment.

Paired angelfish are noticeably different from singles. A bonded pair will swim together, defend a shared territory, and coordinate during spawning and fry-guarding. Watching a pair work together to protect their brood is one of the most engaging behaviours in the freshwater hobby. However, breeding pairs also become the most aggressive fish in the tank, which can disrupt an otherwise peaceful community.

Angelfish are also surprisingly interactive with their keepers. They learn feeding schedules, recognise the person who feeds them, and will often approach the front glass when someone enters the room. This level of awareness makes them feel less like decoration and more like genuine aquarium pets.

Why Buy from Tropical Fish Co?

When customers search angelfish UK, angelfish for sale UK, or freshwater angelfish online UK, they are usually looking for healthy, well-conditioned fish with good fin quality and stable behaviour. Angelfish are one of the species where quality on arrival matters enormously — stressed or damaged fish take weeks to recover and may carry disease that only manifests after the stress of transport.

Our angelfish are held, observed, and fed on a varied diet including frozen foods before dispatch. We check for intact fins, clear eyes, and confident feeding behaviour. For customers planning an angelfish purchase, that matters because well-conditioned fish integrate more smoothly into established aquariums and show their best colour faster.

Each order is packed for live fish transport with insulated materials, secure fish bags, and seasonal heat packs when needed. Tracked delivery helps reduce time in transit, and careful packing reduces temperature swings — which is especially important for angelfish, as they are more sensitive to temperature drops than many tropical species.

Why Choose Tropical Fish Co for Angelfish

• Selected for intact finnage and confident feeding behaviour before dispatch
• Held and monitored on a varied diet including frozen foods, not just flakes
• Packed specifically for tall-bodied cichlids with insulated materials and seasonal heat protection

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To build a well-balanced angelfish community, consider adding Bristlenose Plecos as hardworking algae-eating bottom dwellers that angelfish completely ignore. For active mid-water movement in larger tanks, schooling fish like Kuhli Loaches make excellent peaceful bottom-dwelling companions. If you enjoy the cichlid personality but want to explore other species, our Cichlid Care Guide covers the broader family. For aquarists planning a planted angelfish display, our Live Plants for Beginners guide covers the best species for creating the tall, structured layout that angelfish thrive in.

Answers to the most common questions

Angelfish For Sale

We currently have angelfish variants in stock with UK delivery. Scroll down to the shop block for live prices and add-to-cart.

Angelfish Lifespan

Angelfish typically reach an adult body size of around 15 cm (20 cm+ including fins) and live 8-10 years with good care. Some specimens in well-maintained aquariums have reached 12+ years.

Angelfish Breeding

Breeding angelfish in the home aquarium is achievable for hobbyists with moderate experience. They are substrate spawners that form pair bonds and guard their eggs and fry — see the breeding section above for full details.

Angelfish Care

Angelfish care is considered moderate. They need a tall tank of at least 120 litres, temperature of 24-30 °C, and pH in the 6.0-7.5 range. Regular water changes and a varied diet are essential.

Angelfish Tank Mates

Choose tank mates carefully — avoid anything small enough to eat (neon tetras, cardinal tetras) and any fin-nippers (tiger barbs). Good companions include corydoras, bristlenose plecos, and larger tetras. See the compatibility section above for full guidance.