Guppies

[Hammer fish]

Hi I have guppies and mollies mixed breeding in a 100L tank could I put a small power head in to move the water about and to help keep the bottom clear or would this stress the fish out or harm the fry in the tank thanks please advise me

 

[molliwopp]

Well that all depends on the powerheads size and position and basicly how much water its going to be moving around the tank. You can get powerheads with a sponge prefilters to stop fry being sucked up the intake and also flow control. Is creating water movement a problem without one? If so then it will do no harm if you take the things i mentioned into consideration.