I have a sca-301 and it works pretty good after about a year the pump that had come with it had failed so i went to the LFS and purchased a new pump that fit into the inlet. Everything seems to be working fine I have to set it one setting higher with this pump 3 instead of 2 however it seems to be skimming just fine. My question is I was doing my monthly cleaning of the skimmer and it appears that the new pump is not a needlewheel pump like the old one. From what i read most skimmers are needlewheel because people say they break the bubbles into smaller bubbles for better skimming. Should i replace the pump again to a needlewheel pump it really seems to skim just fine collection cup is almost full of stinky brown tea colored water every 2 to 3 days.