Now that i have upgraded pumps on my Remora C hang-on (MJ-1200) (Thanks for all your help) Now i have bubbles in the tank from the hang-on, is it because the remora is new (less then a week old) or is it due to the incressed pump size, and how do i stop it, will the bubbles have any ill effect on the fish? i noticed the bubbles sticking to one fish. Thanks again, i don't think my tank would be as good without the help of this board.