I have 4 of them in a 180L Juwel and they hide about 98% of the time. Theres about 20 other fish in there, which are 2 Madagasgers and the rest are Head n Tail lights, green eyed rasboros, Glo Light Tetras, a small red tailed shark and Kuhli loaches. All fish are smaller than the clowns except the Madagasgers.
I know they are better in larger groups (but thats what the fish stores say about most the fish) I just hoped 4 would be enough
Do I need to get more Clowns to get them active? Or are they spooked by the other fish? I would just get more except its starting to get a few too mnay in there than I would like