I believe the Octopus and MSX are the same skimmer. For whatever reason, I could not get the skimmer to work correctly. After several months of trying to fix it over the phone with customer support, they finally had me send the pump back to them. The problem was that it kept overflowing the skimmer cup. It would work great for 2-3 days and start collecting a lot of waste in the cup and then out of nowhere it would overflow sending all the waste back into my system. Apparently the needle wheel inside the pump was out of round and causing the problem, but even after getting the fixed pump back I could never get it to work well.