I bougth couple rainbow fishes for my tank and one of them seem to be less active i thought at first it was just new to it and it need to be adjust to new tank. so feeding time it doesn't even care it just hanging at the lower tank and barely move. it only move if some other fish spooked it. its been couple of days now and it still do the same thing. don't care about food. and the other rainbow was just roaming all over the place eat like it should. Now if anyone have the similar issue with this?