6 × Ember Tetras (Hyphessobrycon amandae)

Decide whether Ember Tetras suit your aquarium

The Ember Tetra (Hyphessobrycon amandae) is a tiny freshwater American tetra from the Araguaia River basin in South America. FishBase records a maximum length of 2 cm standard length and places the species in the family Acestrorhamphidae. It suits a mature, gently filtered planted aquarium where a proper shoal can use open middle-to-upper water while remaining close to cover.

This is a very peaceful, gregarious fish rather than a bold choice for a busy community. Plan for 8–10 or more Ember Tetras, calm tankmates and an aquarium base measuring at least 45 × 30 cm or an equivalent footprint. A tank of those base dimensions holds roughly 41 litres in the example given by Seriously Fish. The group needs room to move together, but planting, floating cover, wood and leaf litter also give the fish sheltered areas.

The adult length must not be used as a litres-per-fish shortcut. A shoal shares swimming space, cover, oxygen and filtration capacity, while every additional fish adds waste and feeding demand. Assess the complete community against the aquarium footprint and the capacity of its mature biological filter.

Orange-gold colouring and translucent fins make the group visible against plants and darker materials, but the social display is the main feature. Seriously Fish describes Ember Tetras as naturally schooling fish that become less shy and show more interesting behaviour in an appropriately sized group.

Plan beyond the six-fish pack

One purchase supplies a pack of six live Ember Tetras. Seriously Fish recommends a minimum purchase of 8–10 specimens because the fish are gregarious and naturally form schools. Use this pack to add to an established compatible Ember Tetra shoal or as part of a clear plan to reach 8–10 or more without exceeding the aquarium’s capacity.

Do not let the pack quantity become the permanent social limit. Before adding another group, count the Ember Tetras already in the aquarium, consider the adult sizes of every resident and confirm that ammonia and nitrite are both zero. Additions increase feeding and waste, so the filter’s beneficial bacteria must adjust to the higher biological load.

Understand the offer

• Sold unit: one pack containing six live fish.
• Scientific name: Hyphessobrycon amandae.
• Adult planning length: 2 cm standard length.
• Social plan: a group of 8–10 or more.
• Temperament: very peaceful, with calm tankmates needed.

Sex is guaranteed only when the selected option explicitly states male or female. This 6 × Ember Tetras listing has no sex-guaranteed option.

The gallery images are representative of this type of animal rather than photographs of the exact animal supplied, so colours can look slightly different from the live animal.

Set the decisive numbers before purchase

Prepare an aquarium base measuring at least 45 × 30 cm or an equivalent footprint, then maintain the overlap of the relevant FishBase, Seriously Fish and OATA ranges: 24–27°C, pH 6.5–7.0 and 4–10 dGH. These values belong together: aquarium size cannot compensate for unsuitable water, and suitable water cannot compensate for an immature filter or an incomplete social plan.

The pack can be added only as fast as the aquarium can absorb the extra waste. If six fish would take the aquarium beyond its sensible stocking level, increase capacity before increasing the shoal. If a smaller established group will reach at least 8–10 after the addition, check that existing residents are healthy and that the complete community shares compatible water and temperament.

Give the shoal space, cover and gentle flow

Use an aquarium with a base measuring at least 45 × 30 cm or an equivalent footprint. The Seriously Fish profile for Hyphessobrycon amandae associates those dimensions with roughly 41 litres and recommends a heavily planted arrangement with gentle filtration.

Divide the aquarium into useful areas

• Open water: preserve a clear route through the middle-to-upper part of the aquarium so the shoal can move together.
• Planted cover: place live plants around parts of the aquarium rather than filling every swimming route.
• Surface shelter: use floating plants as an additional shaded refuge.
• Natural structure: driftwood branches and dried leaf litter can create cover and visual boundaries.
• Substrate: a darker substrate complements the planted arrangement recommended for the species.

Balance cover with swimming room instead of choosing one at the expense of the other. A completely open aquarium removes the sheltered areas these small fish can use, while an arrangement packed tightly from front to back leaves too little clear water for coordinated movement. Look across the aquarium at fish level and confirm that there is an uninterrupted route between planted zones.

Keep water movement gentle. Seriously Fish notes that an air-powered sponge-style filter is normally adequate and that some movement is acceptable. For an aquarium around 41 litres, its example filter rating is 80–125 litres per hour. Treat that figure as a matching example for the stated aquarium size, then observe whether the shoal can hold position and feed without being pushed continually into one area.

Floating plants, branches and leaf litter must not prevent routine cleaning or block the filter. Inspect the intake and water return whenever plants are trimmed or leaves shift. A gentle current still needs to circulate clean, oxygenated water through the aquarium and filter.

Dried leaves decompose over time, so use them as part of a maintained aquarium rather than leaving accumulating debris untouched. Seriously Fish notes that decomposing leaf litter encourages microbial colonies and that these microorganisms can become a secondary food source for fry. Remove excessive solid waste during water changes while preserving the planned shelter.

Keep water within the routine overlap

Keep Ember Tetras at 24–27°C, pH 6.5–7.0 and 4–10 dGH. These routine values sit within every relevant range for each measurement: Seriously Fish gives 20–28°C, pH 5.0–7.0 and 1–10 dGH; FishBase records 24–28°C for the wild environment; and OATA’s group guidance for tetras and pencilfish gives 22–27°C, pH 6.5–8.0 and 4–12 dGH.

Use the numbers as operating limits

Measure the aquarium rather than relying on the heater dial, tap-water report or an earlier test. The water chemistry guide explains the role of each test, while the water matcher helps compare measured values with this planned range.

Test source water as well as aquarium water when diagnosing a change. A rising aquarium nitrate reading means something different from a high starting value in the tap supply, which is why OATA expresses its nitrate limit relative to normal tap water. Record the two readings separately so a trend is visible.

Respond first to toxic nitrogen compounds. Any detectable ammonia or nitrite requires prompt water-quality action because both should remain at zero. Check feeding, dead plant matter, filter flow and recent stocking changes, then carry out an appropriate conditioned water change and continue testing.

A value inside the range is useful only when it remains controlled. Avoid abrupt temperature or chemistry changes during maintenance. Match replacement water sensibly to the aquarium, treat tap water before adding it and make adjustments in measured steps rather than repeatedly moving values back and forth.

Mature the filter before adding the pack

Use a fully matured biological filter before adding Ember Tetras. The RSPCA explains that fish release toxic ammonia, which filter bacteria convert first to toxic nitrite and then to the safer nitrate. A filter moving water is not necessarily biologically ready; test results must show that the aquarium can process waste.

Confirm readiness before the fish arrive

1. Run the complete aquarium with its filter, heater, substrate and planned decoration in place.
2. Confirm that ammonia and nitrite are both 0 mg/l.
3. Measure temperature, pH and general hardness against the overlap of the relevant FishBase, Seriously Fish and OATA ranges: 24–27°C, pH 6.5–7.0 and 4–10 dGH.
4. Check that the filter return creates gentle circulation rather than forcing fish against the flow.
5. Count existing livestock and plan the final Ember Tetra group of 8–10 or more.

The first tropical aquarium guide gives a practical route through preparation and maturation. Complete that work before arranging livestock; the small adult size of an Ember Tetra does not remove the need for established bacterial filtration.

Stock gradually when the aquarium already contains fish. OATA warns that increasing livestock and food raises the demand on the nitrifying bacteria in the filter. Adding animals faster than those bacteria can adjust can cause new tank syndrome, with ammonia or nitrite rising to harmful levels.

Use test results and the behaviour of the whole community to judge each addition. A tank that handled its earlier stocking may react differently after six fish and their food are added. Test after the change instead of assuming that previous stability guarantees future capacity.

Protect the bacterial colony during maintenance. Never rinse biological filter media under the tap because chlorine or chloramine may kill beneficial bacteria. When cleaning is needed, rinse the media lightly in aquarium water removed during a water change. Restore normal flow without making every component sterile.

Check filters for blockages whenever circulation weakens. Plant fragments, leaf litter and fine debris can restrict an intake, while a clogged sponge can reduce both mechanical capture and oxygen delivery to bacteria. Correct the blockage gently and preserve mature media wherever possible.

Feed small foods that match a micropredator

Feed appropriately tiny dried food together with small live or frozen invertebrate foods. Seriously Fish describes Ember Tetras as probable micropredators that feed on tiny invertebrates and other zooplankton in nature. In the aquarium, it recommends dried foods of a suitable size plus daily offerings such as Artemia nauplii, Moina and grindal worm.

Build one controlled daily meal

• Dried portion: choose a quality food with particles small enough for a 2 cm fish to take easily.
• Live or frozen variety: offer a suitably small item such as Artemia nauplii, Moina or grindal worm each day.
• Portion limit: provide only what the fish can eat within a few minutes.
• Distribution: spread the food where the whole shoal can reach it instead of dropping everything into one point.
• Clean-up: remove persistent uneaten food before it breaks down and affects water quality.

OATA recommends feeding tetras once a day and limiting the portion to what they consume within a few minutes. Watch the complete group throughout that window. Six or more tiny mouths can make a portion disappear quickly at one end of the aquarium while timid fish at the other end receive little.

Particle size is part of nutrition. A food can match the recorded diet but still be impractical if the fish cannot swallow it. Observe several successful feeding responses rather than judging the food by its label or by whether larger tankmates can eat it.

Competition is the main community feeding risk. Seriously Fish notes that Ember Tetras do not compete well with very boisterous or much larger tankmates. If other fish take every particle first, distribute food across a wider area and reassess whether the community is calm enough for Ember Tetras. Do not solve persistent competition by adding excessive food, because leftovers increase the waste entering the filter.

Use body condition and interest in food as routine indicators. A sudden reduction in feeding response, repeated spitting out, inability to reach food or one fish becoming noticeably thinner calls for a water test and closer observation. Check whether the problem affects one fish or the whole shoal, as that distinction helps separate competition from an aquarium-wide water issue.

Follow a weekly maintenance routine

Change 25% of the water at least once each week and test ammonia and nitrite at least weekly. OATA also advises keeping nitrate no more than 20 mg/l above the normal tap-water level. Increase observation and testing after livestock additions, feeding changes, filter disruption or an unexpected change in behaviour.

Use a repeatable weekly sequence

1. Observe the shoal before disturbing the aquarium: note swimming level, breathing, colour, appetite and use of cover.
2. Test ammonia, nitrite and nitrate, then record the results with temperature and any relevant pH reading.
3. Remove approximately 25% of the aquarium water while siphoning accessible solid waste from the substrate.
4. Treat replacement tap water with conditioner to remove harmful chlorine or chloramine.
5. Check the filter intake and return for blockages and confirm that the restored flow remains gentle.
6. Rinse filter media lightly in removed aquarium water only when cleaning is needed.
7. Recheck equipment and watch the fish after the aquarium has settled.

Do not turn a partial water change into a complete reset. Beneficial bacteria live on filter media and other wet surfaces, so preserving the mature filter is more useful than making every component look new. Clean enough to restore flow and remove accumulating waste while keeping biological media wet and protected from tap water.

Test trends are more informative than isolated readings. A nitrate level rising faster than usual can point to heavier feeding, increased stocking, decomposing material or a missed water change. Ammonia or nitrite appearing after filter cleaning can indicate disruption to biological filtration. Record what changed alongside the numbers.

Act on changes promptly

Watch for surface hanging, bottom sitting, erratic swimming, faster or slower gill movement, unusual hiding, colour becoming markedly darker or paler, white spots, fluffy growths, damaged fins, lost scales, body-condition changes or reduced feeding. These signs can have different causes, so begin by testing water quality and checking temperature and filter operation.

If a health change persists after immediate water and equipment checks, contact us for guidance. Keep the latest ammonia, nitrite, nitrate, temperature and pH readings ready, along with when the change began and whether it affects one fish or the whole shoal.

Acclimatise the fish and watch the first month

Arrange for someone to receive the parcel so live fish are not left unattended. The Tropical Fish Co delivery and Live Arrival Guarantee policy explains that fish are hand-bagged in pure oxygen, placed in an insulated poly box and packed with a heat pack when the weather calls for it. Transport is handled by a tracked courier licensed to carry live animals.

Follow the arrival sequence

1. Start filming before the parcel is opened, showing the parcel still sealed, the continuous opening and the fish still inside the bag. Keep this short unboxing video for any Live Arrival Guarantee claim.
2. Float the bag in the aquarium for 20–30 minutes.
3. Release the fish after floating without pouring the bag water into the aquarium.

Outside that delivery sequence, prepare and check the aquarium before the parcel arrives. OATA advises confirming that ammonia and nitrite are zero. Maintain the overlap of the relevant FishBase, Seriously Fish and OATA ranges at 24–27°C, pH 6.5–7.0 and 4–10 dGH. Do not use the arrival period to finish cycling the filter, rearrange the complete aquarium or correct a major chemistry mismatch.

Check the first week

• Daily: count the fish, observe swimming and breathing, and check whether every member reaches food.
• After feeding: remove persistent leftovers and confirm that calm fish are not being displaced by faster tankmates.
• Water quality: test ammonia and nitrite more often after the new biological load is added.
• Equipment: confirm steady temperature and gentle, unobstructed filter flow.
• Social behaviour: distinguish normal movement between cover and open water from prolonged isolation or unusual hiding.

During the first month, look for a stable pattern rather than demanding one fixed pose or colour intensity. Ember Tetras use middle-to-upper water, but individuals may move among plants, floating cover and open areas. The important comparison is with the group’s developing normal behaviour in that aquarium.

Review the final shoal plan once the first pack has settled. If the aquarium is intended to hold more Ember Tetras, confirm zero ammonia and nitrite, stable routine readings and adequate capacity before adding fish. The long-term target remains 8–10 or more, but increasing the group gradually is safer than exceeding what the mature filter and total aquarium can support.

Choose calm, similarly sized tankmates

Choose peaceful tankmates of a similar adult size that share the same water requirements. Ember Tetras are described by Seriously Fish as very peaceful, but they do not compete well with very boisterous or much larger fish. Avoid fish large enough to eat them, and do not rely on their 2 cm adult length to make them suitable for every community.

Use this compatibility screen

Seriously Fish also describes the species as a useful dither fish for Apistogramma and other dwarf cichlids because Ember Tetras tend to use the middle-to-upper regions and do not normally hunt fry. That is a conditional pairing, not a substitute for checking the cichlid species, aquarium footprint, territories and water requirements.

For an animal not named here, screen its adult size, temperament, feeding pace, water range and usual swimming area before combining it with Ember Tetras. Compatibility remains dependent on the actual species and aquarium arrangement.

Do not use a shared geographical origin as the only test. Two South American fish can still differ in adult size, pace, territorial behaviour or water needs. Likewise, a fish from another region may fit when all practical requirements align.

Group size also affects community planning. Reserve enough capacity for at least 8–10 Ember Tetras before filling the remaining space with companion species. A varied community is not a good trade for leaving a gregarious fish in an incomplete group.

Judge compatibility by behaviour and feeding

Observe what happens at feeding time and in open water. A community can appear peaceful while one species consistently reaches every food particle first or keeps Ember Tetras pressed into cover. Seriously Fish identifies competition from boisterous or much larger tankmates as a particular weakness for this species.

Read the aquarium’s response

• Good fit: the Ember Tetras move between open water and cover, maintain their group and all reach suitably small food.
• Feeding concern: faster fish clear the food before the shoal can take it.
• Space concern: another species repeatedly occupies or defends the main swimming route.
• Predation concern: a tankmate can swallow a 2 cm fish or persistently stalks the shoal.
• Water concern: the proposed companion requires values outside the relevant FishBase, Seriously Fish and OATA overlap of 24–27°C, pH 6.5–7.0 or 4–10 dGH.

If feeding competition is mild, distribute appropriately sized food across more than one point and watch whether every fish eats. If the same individuals remain excluded, reassess the combination rather than increasing the total portion. Extra food that Ember Tetras still cannot reach will decay and add waste.

Use adult measurements for every candidate. A juvenile companion may appear similar in size when introduced but become a much larger or more boisterous fish. Compare its planned adult size with the Ember Tetra’s 2 cm standard length before it enters the aquarium.

Check swimming level as one part of the plan. Ember Tetras tend to occupy middle-to-upper water, so a sedate species using another level may reduce direct competition. This does not remove the need to check adult size, temperament, feeding and total biological load.

Reassess after any stocking change. A combination that worked with fewer fish may change when territories, food demand and waste increase. Test ammonia and nitrite, watch the first several meals and confirm that the Ember Tetra shoal still uses the aquarium normally.

When comparing two possible companions, prefer the calmer fish that stays within the same water range and cannot eat an adult Ember Tetra. Then check whether the aquarium still has capacity for the planned shoal of 8–10 or more. That sequence keeps the social needs of the listed fish at the centre of the decision.

Answer common Ember Tetra questions

How big does Hyphessobrycon amandae get?

It reaches 2 cm standard length. FishBase records that maximum, and Seriously Fish also gives an adult standard length of 20 mm.

What size aquarium does Hyphessobrycon amandae need?

Use an aquarium base measuring at least 45 × 30 cm or an equivalent footprint. Seriously Fish associates those dimensions with roughly 41 litres and recommends planting, cover and gentle filtration.

How many Ember Tetras should I keep together?

Plan a group of 8–10 or more. Seriously Fish recommends a minimum purchase of 8–10 because the fish naturally form schools and become less shy in an appropriate group.

Is Hyphessobrycon amandae suitable for a first-time keeper?

It can suit a careful first-time keeper who prepares a mature filtered aquarium, maintains the relevant FishBase, Seriously Fish and OATA overlap of 24–27°C and pH 6.5–7.0, and has room for 8–10 or more peaceful fish.

What do Ember Tetras eat?

Feed suitably tiny dried food with small live or frozen foods such as Artemia nauplii, Moina or grindal worm. Offer one controlled daily meal that the shoal finishes within a few minutes.

What temperature and pH does this fish need?

Keep it at 24–27°C and pH 6.5–7.0, with general hardness of 4–10 dGH. This routine range is the overlap of the relevant FishBase, Seriously Fish and OATA values.

Is this fish aggressive or likely to nip fins?

Seriously Fish describes it as very peaceful. The main concern is the opposite: very boisterous or much larger tankmates may intimidate it or prevent it from reaching food.

Which kinds of fish can it live with?

Consider similarly sized peaceful characids, smaller callichthyid or loricariid catfishes, sedate hatchetfishes, smaller rasboras, barbs or anabantoids, and appropriately planned dwarf-cichlid communities. Every candidate must share compatible water, space and temperament.

How do these fish travel to a home in the UK?

They are hand-bagged in pure oxygen, placed in an insulated poly box and given a heat pack when weather calls for it. A tracked courier licensed for live animals carries the parcel, and someone must receive it. Start filming before opening the sealed parcel, continue through opening until the fish are visible inside the bag, then float the bag for 20–30 minutes before releasing the fish without pouring bag water into the aquarium.

References for identity, care and welfare

• FishBase: Hyphessobrycon amandae — scientific identity, family, distribution, environment and maximum recorded length.
• Seriously Fish: Hyphessobrycon amandae — aquarium dimensions, water, layout, diet, behaviour and compatible fish types.
• OATA: tetras and pencilfish — routine feeding, maintenance, water-quality and stocking guidance.
• RSPCA aquarium welfare guidance — biological filtration and nitrogen-waste processing.
• Tropical Fish Co delivery and Live Arrival Guarantee policy — packing, transport and acclimatisation procedure.