Hyphessobrycon margitae (Red Blue Peru Tetra) - UK

If you want a small tetra that looks far more exotic than its size suggests, Hyphessobrycon margitae deserves a place on your shortlist. Often sold as the Red Blue Peru Tetra, Margit’s tetra combines warm ruby tones with cool metallic blue flashes that intensify in soft, tannin-rich water. This South American tetra UK hobbyists seek out stays compact at around 4 cm, lives for up to 5 years, and suits aquarists who enjoy a colourful tetra for planted tank displays rather than loud, boisterous community fish. It is a peaceful rare schooling fish from Peru’s Amazon basin, best kept in a proper group where its confidence and colour both improve.

For fishkeepers building a blackwater or lush aquascape, Hyphessobrycon margitae stands out as a vibrant rare tetra for aquarium layouts. Its manageable care needs, modest red blue oeru tetra tank size requirement, and gentle temperament make it a strong choice for a Hyphessobrycon margitae community tank. See our detailed photos showing the contrast of red flanks and blue iridescence in shaded planting, and you will understand why many hobbyists compare it to a Diamond Flame Tetra, ruby tetra, or even a super blue emperor tetra in terms of visual impact. If you want a rare tetra that rewards good husbandry with outstanding colour and elegant schooling behaviour, this species is an excellent pick.

Where Do Hyphessobrycon margitae Come From? Natural Habitat Explained

The Hyphessobrycon margitae habitat is in Peru within the Amazon basin, where slow-moving forest waters, leaf litter, submerged roots, and seasonal tannins shape the conditions these fish evolved in. The ruby tetra origin often confuses hobbyists because common names vary between shops, but this species is firmly associated with Peruvian waters and is best thought of as a specialist freshwater tetra UK keepers can use for a South American-style setup.

In the wild, the ruby tetra habitat is typically soft and acidic, with dim light filtered through overhanging vegetation. That natural setting explains why this fish shows its best colour in a planted aquarium with dark substrate and some shaded zones. The ruby tetra natural habitat also contains tiny aquatic invertebrates, insect larvae, organic detritus, and fine plant matter, which helps explain its omnivorous feeding habits in captivity.

Because it comes from calm, structured environments, the Red Blue Oeru Tetra does not appreciate harsh flow or stark, bare tanks. Replicating the wild ruby tetra environment with driftwood, botanicals, and soft water can make a dramatic difference to confidence, colour, and schooling behaviour. For aquarists keeping rare tropical fish UK collections, this species offers a genuine biotope feel without the size demands of larger characins.

Useful habitat targets include a red blue oeru tetra pH range of 5.0 to 7.0, low mineral content, and stable warmth. If you are comparing species, the red blue oeru tetra vs neon tetra question usually comes down to subtlety: neons are bolder and more familiar, while H. margitae is rarer, warmer in tone, and especially effective in blackwater or heavily planted displays.

How to Set Up the Perfect Tank for Hyphessobrycon margitae

A successful red blue oeru tetra care guide starts with one principle: think soft, stable, planted, and calm. Although this species is not especially large, it is still an active schooling fish that needs room to move as a group. The minimum red blue oeru tetra tank size is 60 litres, but a 75-90 litre aquarium is much better if you want a fuller school and more natural behaviour. The same advice applies if you searched for ruby tetra tank size or diamond flame tetra minimum group size; these fish look and behave better in numbers.

Tank Size Requirements

The baseline ruby tetra tank size is 60 litres for a small group of 6, though 8-12 fish is more realistic for display quality. A larger footprint matters more than height because this species uses the middle water column and benefits from horizontal swimming space. If you want a true diamond flame tetra school size effect with synchronized movement, start with at least 8 specimens.

For aquascapers designing a red blue oeru tetra tank setup, aim for dense planting at the back and sides, open swimming space in the centre, and a few shaded retreats. This layout reduces stress and helps establish a stronger pecking order without aggression. It also supports their role as a diamond flame tetra for planted aquarium style fish.

Water Parameters

The most reliable red blue oeru tetra water parameters are 23-28°C, pH 5.0-7.0, and hardness 2-10 dGH. The ideal Hyphessobrycon margitae temperature range for colour and activity is 24-26°C. If you were searching for red blue oeru tetra temperature, ruby tetra temperature, or ruby tetra water temp, this is the range to remember.

Soft water is especially helpful. The preferred diamond flame tetra water hardness sits in the lower end of the range, around 2-6 dGH, though captive fish can adapt to slightly harder conditions if changes are gradual. Stable ruby tetra water parameters matter far more than chasing extremes, so avoid sudden shifts in pH or temperature.

Filtration and Flow

Gentle filtration works best. A mature sponge filter or a compact external filter with spray-bar diffusion is ideal because it keeps water clean without pushing the fish around. These are not riverine tetras, so avoid excessive current. Fine mechanical filtration plus biological media is enough for most setups, especially if the tank is planted and lightly stocked.

If you are building a calm tetra aquarium, pair this species with dependable life-support equipment such as an aquarium filter for planted tanks and a reliable thermostatic aquarium heater. Stable heat and oxygenation will do more for long-term health than chasing expensive additives.

Substrate, Plants and Decor

A dark sand or fine gravel substrate makes the fish feel secure and visually intensifies the red body tones. Add driftwood, seed pods, and leaf litter for a blackwater effect. For planting, use species such as Cryptocoryne, Java fern, Anubias, Amazon swords, and floating Salvinia or frogbit to diffuse light. This is exactly why many hobbyists describe it as a colourful tetra for planted tank projects and a diamond flame tetra for planted aquarium display fish.

To complete the look, combine natural décor with easy greenery from our live aquarium plants collection and root-friendly aquarium substrate options. The result is a setup that suits both the fish and the aquascape.

Lighting Requirements

Moderate lighting is best. Very bright, unshaded lighting can wash out colours and make the fish nervous. Use floating plants or hardscape shadows to break up intensity, and keep the photoperiod around 6-8 hours if algae is a concern. In balanced planted tanks, 8-9 hours is usually fine.

What Do Hyphessobrycon margitae Eat? Complete Feeding Guide

If you have been asking what do ruby tetras eat, the answer is simple: a varied omnivorous diet built around small, high-quality foods. In nature they pick at tiny crustaceans, insect larvae, and organic matter. In captivity, the best ruby tetra food is a mix of fine flakes, micro pellets, frozen cyclops, daphnia, baby brine shrimp, and occasional live foods. A good diamond flame tetra diet should focus on variety rather than one staple product.

Staple Foods

Use a quality fine flake or micro pellet as the base diet. This covers daily nutrition and is easy for the fish to take from the midwater zone. For fish in display tanks, a colour-supporting staple can help maintain the rich tones that make this species so attractive.

Supplemental Foods

Frozen cyclops, daphnia, and baby brine shrimp are excellent 3-4 times per week. These foods improve body condition, stimulate natural hunting behaviour, and are especially useful before breeding attempts. If you are following a diamond flame tetra feeding guide, this is where the fish really benefits from variety.

Treats and Conditioning Foods

For conditioning adults, small live foods such as microworms or newly hatched brine shrimp can be very effective. These are useful if you are researching hyphessobrycon margitae breeding or how to breed ruby tetra. Keep portions small and remove leftovers promptly.

Common customer questions include do ruby tetras eat shrimp and will ruby tetras eat shrimp. Adults may pick off tiny shrimplets if they fit in the mouth, but they usually ignore adult dwarf shrimp in heavily planted tanks. Another question is how often to feed tetras; for this species, twice daily in small portions is ideal.

Time	Food	Amount
Morning	Fine flake or micro pellet	What the group finishes in 30-60 seconds
Evening	Frozen daphnia, cyclops, or baby brine shrimp	Small pinch or thawed portion with no leftovers

Questions such as why is my tetra at the top of the tank or why did tetra turn white are often linked to stress, poor oxygenation, or water quality rather than diet alone. Overfeeding is a common cause because it drives ammonia upward and lowers water quality. If fish are hanging near the surface, test water immediately and check aeration.

Hyphessobrycon margitae Appearance: Colors, Patterns & Varieties

Hyphessobrycon margitae is a slim, laterally compressed tetra with a graceful midwater profile and an adult length of around 4 cm. The ruby tetra full size is modest, but the visual effect is striking: a red to orange body wash, blue metallic highlights, and reflective scaling that changes with angle and lighting. This is why some hobbyists compare it to a bleeding blue tetra, ruby red tetra, or blue emperor tetra super blue style fish.

Males are usually slimmer and more intensely coloured, especially when mature and competing gently within a school. A ruby tetra female or hyphessobrycon margitae female is typically a little rounder through the belly and slightly less vivid, particularly when carrying eggs. If you are trying to tell ruby tetra male vs female or hyphessobrycon margitae male or female, body depth and colour intensity are the best clues.

Searches for ruby tetra max size, purple emperor tetra size, and emperor tetra school size often come from aquarists comparing small display fish. This species remains smaller and more delicate-looking than emperor tetras, making it better for refined planted aquariums. It is also distinct from fish sold under names like black ruby tetra or ruby red nose tetra, which are different species entirely.

Our photos show the best colour when fish are kept over dark substrate, under moderate lighting, and fed a varied diet. In bright bare tanks, even healthy specimens can look washed out. In shaded planted tanks, the blue flash becomes far more obvious and the red body tone deepens noticeably.

What Fish Can Live With Hyphessobrycon margitae? Compatibility Guide

This species is one of the best rare tetra for community tank setups if you choose companions carefully. The answer to are ruby tetras aggressive is generally no; they are peaceful, though males may posture lightly within the group. The same applies to the common question are emperor tetras aggressive: some emperor-type fish can be more assertive than H. margitae, which is why tank mate selection matters.

A proper Hyphessobrycon margitae community tank should include similarly sized, non-fin-nipping fish that enjoy soft to neutral water. This makes the species ideal for a calm community tetra UK setup or a mixed schooling fish UK display. If you want a red blue oeru tetra for community tank, think peaceful rasboras, pencilfish, dwarf corydoras, small loricariids, and gentle tetras.

Ideal Tank Mates

Good companions include small bottom dwellers and other calm midwater fish. For a species-only group, you can start with 6 x Hyphessobrycon margitae and expand the school as the tank matures. In mixed communities, pair them with fish from our South American tetra collection, plus peaceful catfish and invertebrates.

Suitable options include Corydoras catfish for the bottom zone, Otocinclus algae eaters for soft-water planted tanks, pencilfish species for the upper levels, and gentle dwarf cichlids only in larger, well-structured aquariums. If you prefer a tetra-focused display, compare Hyphessobrycon margitae tank mates with species of similar size and temperament rather than larger active characins.

Species to Avoid

Avoid boisterous barbs, large cichlids, and predatory fish. One common customer search is will blue acara eat tetras; with adult blue acaras, the answer is often yes or at least maybe, especially with a small 4 cm tetra. Large angelfish, adult gouramis with territorial tendencies, and fin-nipping tank mates can also stress them.

Another common question is can you keep a single tetra. No, not if you want normal behaviour. This is a schooling species and should be kept in groups of at least 6, with 8-12 strongly preferred. A lone fish will often hide, fade, and become nervous.

Compatibility with Shrimp and Snails

Adult cherry shrimp and Amano shrimp are usually safe in heavily planted tanks, though shrimplets may be eaten. Snails are generally ignored. If you are keeping a shrimp colony, provide moss and dense cover to protect young shrimp.

Species	Compatible?	Notes
Hyphessobrycon margitae	✅ Yes	Best kept in a group of its own kind for confidence and colour
Corydoras catfish	✅ Yes	Peaceful bottom dwellers that suit similar water conditions
Blue Acara	❌ Avoid	Too large and may view small tetras as food

For aquarists searching for a tetra fish compatibility chart, the key rule is simple: choose peaceful fish with similar water needs and avoid anything large enough to swallow them. This species is a textbook peaceful rare schooling fish and one of the better choices if you want to buy rare tetra UK stock for a planted display.

How to Breed Hyphessobrycon margitae: Complete Breeding Guide

Hyphessobrycon margitae breeding is possible in home aquariums, but it is best described as moderate rather than easy. If you have read about red blue oeru tetra breeding or breeding emperor tetras, the broad method is similar: condition adults well, use soft acidic water, and protect the eggs from hungry parents. This species is an egg scatterer, and adults will eat eggs if given the chance.

Breeding Setup

Use a separate 20-30 litre breeding tank with dim light, very soft water, a pH around 5.5-6.5, and a temperature near the upper end of the normal range, around 26-27°C. Fine-leaved plants or spawning mops help catch eggs, and a mesh or marbles on the base can keep adults from reaching them. This is the most reliable answer to how to breed ruby tetra in a home setup.

Conditioning and Spawning

Condition males and females on live or frozen foods for 1-2 weeks. A fuller-bodied hyphessobrycon margitae female or ruby tetra female is usually ready to spawn when the belly rounds slightly. Introduce a pair or small group in the evening and check for eggs the next morning. If you are wondering how long does it take for tetra to lay eggs, spawning often happens at first light once fish are conditioned and settled.

The eggs are tiny and adhesive. Remove adults after spawning, because they do not provide parental care. Hobbyists searching for ruby tetra eggs should expect a small scatter among plants or mops rather than a nest.

Egg Care and Hatching

Keep the tank dim because eggs and fry can be light-sensitive. Depending on temperature, eggs usually hatch in about 24-36 hours, and fry become free-swimming a few days later. Gentle aeration and excellent hygiene are important, but avoid strong current.

Fry Care and Growth

Feed infusoria or commercial fry food at first, then move onto microworms and newly hatched brine shrimp. If you are asking how fast do tetras grow, growth is steady rather than rapid; good feeding frequency and clean water matter more than trying to push growth. The species reaches saleable juvenile size well before adulthood, but full colour takes longer.

For those researching diamond flame tetra lifespan, good breeding stock should remain productive for multiple seasons if maintained well. As with many characins, the biggest challenge is not getting eggs but raising enough fry past the first delicate weeks.

Hyphessobrycon margitae vs Similar Species: Which Should You Choose?

Small red and blue characins are often sold under confusing trade names, so comparison matters. Shoppers may search for Hyphessobrycon margitae vs ember tetra, diamond flame tetra vs cardinal tetra, or diamond flame tetra vs flame tetra when deciding which fish best suits a planted aquarium. H. margitae sits in the middle ground: subtler than a cardinal, more unusual than an ember, and more refined than many common flame-type tetras.

Feature	Hyphessobrycon margitae	Ember Tetra
Max Size	4 cm	2-2.5 cm
Care Level	Moderate	Easy
Temperature	23-28°C	24-28°C
Price	£14.52	Varies by stock
Best For	Rare planted displays	Nano community tanks

Feature	Hyphessobrycon margitae	Cardinal Tetra
Colour Style	Ruby-red with blue sheen	Bold neon blue and red stripe
Temperament	Peaceful, slightly shy at first	Peaceful, active schooler
Water Preference	Soft, acidic to neutral	Soft, acidic preferred
Rarity in UK	Higher	Common
Best For	Collectors of rare tetra species UK	Classic community aquariums

If you want something uncommon, elegant, and especially effective in a blackwater aquascape, choose H. margitae. If you want a widely available beginner fish, ember or cardinal tetras may be easier to source. Searches such as super blue emperor tetra, super blue emperor tetra inpaichthys kerri, or inpaichthys kerri blue emperor tetra super blue refer to a different fish entirely, with a cooler overall look and different body shape. Likewise, names such as axelrodia riesei ruby tetra can refer to other ruby-type tetras, so scientific names matter when comparing.

Some hobbyists also ask about hyphessobrycon procyon, hyphessobrycon peruvianus, hyphessobrycon loretoensis, or hyphessobrycon negodagua. These are separate species and should not be treated as direct synonyms. If your goal is a rare Peruvian display fish with red-blue contrast, Hyphessobrycon margitae is the species to target.

Common Health Problems in Hyphessobrycon margitae & How to Prevent Them

A healthy ruby tetra is alert, evenly coloured, feeding eagerly, and schooling without clamped fins. If you are wondering are ruby tetra hardy or how hardy are tetras, the answer is that this species is reasonably robust once established, but it dislikes sudden swings in water chemistry and poor acclimation. It is not fragile, but it is not a fish for neglected tanks either.

Signs of a Healthy Fish

Look for clear eyes, smooth breathing, intact fins, and a willingness to feed. In a settled group, mild sparring between males is normal, but relentless chasing is not. New arrivals may be a little subdued for a few days, which is why some people ask are ruby tetras shy. They can be shy at first, especially in small groups or bright tanks, but they usually settle well.

Common Problems

The main risks are stress-related fading, fin damage from unsuitable tank mates, and common tetra ailments such as ich, bacterial infections, or wasting linked to poor water quality. Questions like why did tetra turn white often point to stress, disease, or ammonia exposure. Surface-hanging behaviour behind the question why is my tetra at the top of the tank usually suggests oxygen or water-quality trouble.

Treatment and Prevention

Prevention is built on stable water, regular weekly changes of 20-30%, varied feeding, and proper quarantine. Use a separate hospital tank if treatment is needed. If invertebrates are present, read medication labels carefully because many treatments are not shrimp-safe.

For aquarists browsing tropical tetra fish UK or rare tropical fish UK listings, this species rewards consistency. Most health issues we see are not species-specific; they come from rushed cycling, overstocking, or mixing them with unsuitable fish.

Understanding Hyphessobrycon margitae Behavior in the Aquarium

Hyphessobrycon margitae is an active but refined midwater schooler. It is not hyperactive like some larger tetras, and it is not solitary. The fish spends much of the day weaving through open spaces between plants, pausing under cover, then regrouping in loose formation. In the right group size, it becomes one of the most attractive examples of a peaceful rare schooling fish.

If you are asking whether this species behaves like emperor tetras, the answer is partly. Males may posture and display, but serious aggression is uncommon in a spacious planted tank. A proper diamond flame tetra behaviour pattern includes short dashes, subtle dominance displays, and stronger colour during feeding or courtship.

To encourage natural behaviour, keep at least 6 fish, preferably more, and provide visual barriers with plants and wood. This also answers the common concern over tetra requirements: group size, stable water, and cover matter just as much as temperature or pH. In sparse tanks they may hide; in mature planted aquariums they show far more confidence.

Why Buy from Tropical Fish Co?

When you order Hyphessobrycon margitae for sale UK stock, the difference is not just the species name on the label. This fish often arrives in the trade under mixed common names such as Red Blue Peru Tetra, Diamond Flame Tetra, or ruby-type tetra, so accurate identification matters. We list it clearly as Hyphessobrycon margitae so you know exactly what you are buying.

Before dispatch, our fish are settled, observed, and feeding on prepared foods. That matters with rare characins because newly imported fish can be shy and washed out. We hold them long enough to confirm feeding response and basic stability, then pack them in insulated boxes with appropriate seasonal protection, including heat packs in winter. Tracked delivery and professional bagging help reduce transit stress.

If you are comparing hyphessobrycon margitae price, Hyphessobrycon margitae price UK, ruby tetra price, or ruby fish price, remember that condition and identification are as important as the headline number. A correctly identified, feeding, well-settled group is worth more than anonymous “mixed tetra” stock. For collectors searching hyphessobrycon margitae for sale, ruby tetra for sale, ruby tetra for sale uk, ruby tetra for sale near me, buy ruby tetra, buy red blue oeru tetra UK, diamond flame tetra for sale UK, red blue peru tetra for sale UK, or oeru tetra buy online UK, confidence in the fish matters.

Order your Hyphessobrycon margitae today if you want a rare, elegant tetra for a planted South American aquarium. It is a superb choice for aquarists who value subtle beauty, true schooling behaviour, and a fish that looks better the better you keep it.

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Build a complete soft-water display around this species with a few carefully chosen additions. Start with another group of Hyphessobrycon margitae so your school reaches display size quickly. Add support species from our Corydoras range or browse peaceful midwater companions in the South American tetra collection. For aquascaping, pair them with items from our live aquarium plants collection, a dependable aquarium heater, and a gentle planted tank filter. To keep colour and condition at their best, use foods from our small fish food range and supplement with frozen fish foods.