well im new to this fourm so il start with that, i picked up 5 Red Belly Piranhas , i know a little about them but not much, i keep the tank at 80 feed them feeder fish, but they dont seem to eat much i was thinking it was the change of the enviorment, i was wondering how often they would need to be fed , how often i should clean the tank , and what would be good for then there not that entergetic , i know they are light sensitive but even in the dark they dont swim much, any comments would be appreciated