I am having a lot of trouble adjusting my prism skimmer. I def. do feel I am getting my $'s worth out of it. Here's the deal. I adjust it one way and it pulls out really thick greenish skimate, yet it NEVER has to be dumped b/c the substance is so thick the cup never fills up. If I just barely open it up a little more (and I do mean BARELY) then the skimate get so thin it fills up the cup and runs back into the tank in like less than an hour! I work so obviously I cannot have it doing that. It will look ok at first and then all the sudden fill up really fast and overflow. I have a little trouble w/ nitrates and I def. feel the skimmer should be working more efficiently! Does anyone else have this problem or any suggestions?