I have a 60 gallon tank that's 48 inches long. I had put an air stone in it to increase aeration while I was getting the cycle going and decided I liked the look of the bubbles. So I installed a bubble curtain going all the way along the back side of the tank. I really like the look it gives. The only problem is, my filter intake hangs at the top of the tank along the back, and it's pulling in a lot of the air causing my filter to cavitate. It's a Magnum 350 canister filter. I was wondering if anyone else has had this problem. Is there anything I can do to prevent the cavitation? Or do I just need to shorten the curtain so that it doesn't feed air up towards the intake? I think it will look lame if the curtain only goes until the last four of five inches of the tank.