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free delivery over £120

Orders under £20 are subject to a £5 surcharge*


(1 customer review)


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Common & Latin Name: Congo Tetra (Phenacogrammus interruptus)

"Good size and lovely colours"

Care level: Easy
Max Size: 7-8cm
Min tank size: 50 Litres
Diet: Omnivore
Temp: 20-28°C
PH: 6.5-7.5
Compatibility: View Chart or More Info
Temperament: Peaceful
Origin: River Congo
Approximate purchase size: 2.5-3cm

How easy are they to keep? Generally Congo Tetra are a hardy species, and easy to keep.

How big do they grow? The Congo Tetra can grow to nearly 8cm in size and it is one of the larger Tetras. As they grow, they will show more colouration.

What is the best sized tank for these? We recommend of minimum of 50 litres however the bigger the better when it comes to aquariums.

What is best to feed them? Not a fussy eater, an omnivore, Congo Tetra can be fed a variety of flake, frozen, freeze dried and live foods for a varied diet. Check out the different variety foods you available in our store.

What water conditions do they require? Temperature can range from 20-28°C & a pH of 5.5-7.5. Most importantly a stable water parameters.

What can they be kept with? Tetras are generally peaceful. The Congo Tetra does well with larger sized tetras, such as the Black Widow or Serpae Tetra, as well as with Barbs, Danios, Gouramis, and Rainbowfish. Bottom dwelling fish are also good companions.

Where are they from? They are found in throughout the River Congo.

Can they be bred in captivity? Congo Tetras are easy to breed; they are egg scattering fish that can be spawned in pairs or in groups. If spawned in a group, use the approximately the same number of males as females. Condition spawning fish with live foods prior to spawning attempts.

If you require any advice on keeping these fish, please contact us and speak to a member of the team.


Answer: Yes, fish are absolutely fine to be shipped, fish stores have their fish shipped to them also so it doesn't make a difference whether buying online or at a store. Your fish will have been shipped at some point. We want our quality livestock to be delivered in the best condition. We use high-quality poly boxes and heat packs. We ensure the bags are filled with pure oxygen and double bagged. We also use a reliable 24-hour licensed courier.


Answer: The 20 Best tropical fish for beginners we recommend are: Guppies – Poecilia reticulata Neon Tetras – Paracheirodon innesi Platy – Xiphophorus maculatus Zebra Danio – Danio rerio Dwarf Gourami – Trichogaster lalius Betta – Betta Splendens Silver Dollar – Metynnis argenteus Peppered Corydoras Catfish – Corydoras paleatus Tiger Barb – Barbus tetrazona Swordtail – Xiphophorous helleri Cardinal Tetra – Paracheirodon axelrodi Firemouth Cichlid Dwarf Cichlid Plecostomus – Hypostomus plecostomus Killifish – Fundulus majalis Mollies – Poecilia sphenops Cherry barb – Puntius titteya Harlequin Rasbora – Trigonostigma heteromorpha Loaches – Cobitidae Angelfish – Pterophyllum scalare


Answer: If you are thinking of keeping tropical fish, you need to know about the following main things: Size of your aquarium Firstly decide how much space you have for your new fish tank. Always go as big as you can fit, the bigger the better with fish keeping. Deciding what to fish to keep This will depend on the size of your aquarium. Research how big a fish is and will grow to. Small community to medium sized community set-ups are best to start with, unless you’re looking to create a biotope or species tank. Cycling your aquarium This is a very important part of keeping your cold water or tropical aquarium. Your filter is just a sponge and is no different than your washing-up sponge…until it’s “cycled” and loaded with beneficial bacteria. Maintaining your aquarium You should clean your tank on a weekly basis. A small 10-20% water change will help remove any build up of waste. Siphon your substrate and clean the glass, this will keep your tank nice and clean for your fish.


Answer: Yes, tropical fish will require a heater. A heater ensures the temperature stays steady during the course of the day. Generally, 25°C is the optimum temperature to keep most tropical fish, this is similar to what they are used to in their natural habitat.


Answer: The equipment you will need when it comes to caring for tropical fish include: A suitable fish tank Aquarium lighting Substrates and aquarium plants to help create a healthy ecosystem A filter system to keep your water clean and clear An aquarium heater A thermometer to keep to checks that the temperature is stable Aquarium test kits to check pH, ammonia, nitrite and nitrate levels Cleaning tools


Answer: In general, most tropical fish thrive on one or two feedings per day. You’ll need to adjust the quantity of food according to the size and quantity of fish in your tank. If your aquarium is new and you have just added your first fish, feed every other day and count the amount of food you are adding. A “pinch” is not accurate enough and may lead to overfeeding your fish.

What is Backorder?

Answer: Available on backorder means we do not have the item currently in stock but are able to order it in and get it out to you quickly.

What is your special local delivery

Answer: This is where we can deliver livestock to you ourselves to save it going to a courier. This means it will be handled with optimum care same day within the local area of our shop.

If you have any questions about this product please feel free to contact us and speak to a member of the team.

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If you live within a 10 mile radius of Birmingham University, and your order is £30 or over (not including postage), you qualify for the option to use our Delta Prime delivery service. This means delivery is at a discounted rate and is also hand delivered by ourselves. For livestock this means there’s no overnight shipping, and hand delivered with care by us. Once your order has been placed, we will contact you to arrange time for delivery. Depending on booking slots, orders placed before 12pm, can be delivered the same day or whenever suits you.


Delivery days & times

7 Days a Week: 3pm-7pm

1 review for CONGO TETRA 3CM

  1. Steve Watts (verified owner)

    Steve Watts.

    I received 9 Congo Tetras just over a week ago all fish arrived safe and healthy. These fish were part of a larger shipment that I purchased from Delta Aquarium and the packaging was excellent. Fish are looking fantastic in my aquarium I really recommend Delta Aquarium. Thank you.

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