Can you please help me? I have a SRO 3000 int skimmer I bought new 9 months ago. Right now I have the skimmer in 6 1/2 " of water. The skimmer will be running and not pulling out a lot of skim mate and all of a sudden the skimmer is over flowing. This happens about once a day. The skimmer is hardly working or its over flowing. I've tried to put the skimmer in 6" of water and the skimmer still is hardly working or its over flowing. It also sucks air if I have the skimmer at 6". Any suggestions?