I have a corallife 65 skimmer set up and have had some questions about its maintainance. It seems the pump supplied is a bit too powerful as I am mostly forced to run it at the lowest flow setting and turn the bubbles way down. Also, every other week or so it seems to get a salt build up that blocks the air input. It IS working though. The water I empty out is a lovely shade of greenish brown. When I have it running how seems best, it requires emptying every 4th day. Is this a normal cycle or am I pushing too much air through it? Thanks.