Congo Tetra
Phenacogrammus interruptus
A large characin. It shines only when swimming as a group in a 90 cm tank or larger. A cramped tank stresses it.
Temp 23~28°CpH 6~7.5GH 3~15Adult 8 cmGroup 6+Min. tank 120 L · 90 cm+ longSwims middlePrice $4.29
How many fit in each tank?
The largest group where none died in 90 days. Tap water · black sand · bacteria starter on day 1 · fish added on day 10 · 25% weekly water changes.
Run a 90 cm standard tank with 6 yourself →Don’t keep with
The same rules the engine uses for tankmates.
Eaten by
Bullied by
Water doesn’t match
Good tankmates
No eating or bullying either way, with plenty of overlap in temperature and pH. Fish that swim at a different level come first.
The numbers on this page come from the Water Kiwoogi simulator model; real tanks can differ.