Mines is always active with lights off, lights on it'll come out for food or at dawn I think makes its rounds. As far as it being with cichlids. I had it with a juvenile jag cichlids up to 6-7". The cat pushed the cichlids around. I had to put a gen inch sun cat with it once, the jag attacked the sun cat over its dw piece. I noticed my trachy and jag only tolerate each other, everything else is a green light over food or dw, they don't seem to care about size either, smaller or bigger, they'll fight over their hide.