May 13, 2010 #22 Bifferwine I am a girl You should have at least 2, even 3 powerheads in a 75 gallon tank. Without any flow, you will not be able to even make a dent in that algae.
You should have at least 2, even 3 powerheads in a 75 gallon tank. Without any flow, you will not be able to even make a dent in that algae.