i had a group of six in a 70 g cube and they schooled together except for one that would stay towards the back of the tank and chase the others off if they got close they were all about the same size 3" and were kept at 74 with quite a bit of flow in the tank about 12x turnover kept with two goonch (which ended up killing them all and the four more I tried to add which were a bit bigger) two climbing perch and a vulture cat
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