Sorry for all the questions guys but I want to know what to do to get my tank right. I'm going saltwater with my 45 gallon. I'm gonna put two penguin bio wheels on it. I read it does need live rock. Ok thats unimportant. My question is:
What exactly does a powerhead do and do I "have" to have one.
What exactly does a powerhead do and do I "have" to have one.