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Longfin Black Widow Tetra Gymnocorymbus ternetzi 3.5cm

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Longfin Black Widow Tetra Gymnocorymbus ternetzi 3.5cm
  • Buy 5 for $5.05 each and save 12%
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Longfin Black Widow Tetra Gymnocorymbus ternetzi


Tetras are considered easy to keep in a community aquarium of at least 20L, with a pH of 5.07.0 and KH of 1.02.0. However, they will not tolerate dramatic changes to their environment. The Tetra can live 10 years or more with the proper conditions. They tend to be timid and, because of their small size, should not be kept with large or aggressive fish who may bully or simply eat them.

Fish that mix well in an aquarium are other types of tetras, and other community fish that live well in an ideal Tetra water condition. Mid-level feeders, they are best kept in schools of five to eight or more, for the "shoaling" effect when they move around the tank. They shoal naturally in the wild and are thus happier, more brightly coloured, and more active when kept as a shoal as opposed to singly.

Tetras are best kept in a densely planted tank with subdued light and an ideal temperature of 2024?C to resemble their native Amazon environment. Tetras are omnivores and will accept most flake foods, but should also have some small foods such as brine shrimp, daphnia, freeze-dried bloodworms, tubifex, and micro pellet food to supplement their diet.
Additional Information

Additional Information

Scientific Name No
Size 3.5

Customer Reviews 2 item(s)

These fish are very shy and active like goldfish. They hide near the top of the Val bush and only become active when I feed them at where they are. They won't travel far for food if you feed on the other side of the 6 feet tank.

Very elegant little ones but they're not for those looking for active fishes.
Customer Rating
Review by William / (Posted on 1/02/2016)
fish arrived safely,and are superb specimens,excellant colour.Lovely long fins.
Customer Rating
Review by nicholas / (Posted on 26/04/2014)