power head question
how many power heads should i have in a 4ft tank.
the reason i ask is i am finding it hard to get a flow toward the bottom of the tank, and it looks like I am getting a cyno out break, so i need some flow down to the bottom, i currently have
2 x 3600L/ph and a 1200Lph the 2 large ones are at the top one each side to agitage the surface water.
one points right toward the middle and the other left like \ /
the 1200 is near the bottom but that seems to be doing very little to get rid of the cyno.
is there a better way i should be pointing the power heads?