Awhile back I picked up an Eshopps psk-100hob skimmer in a great deal. I've been asked by my good friend to post pics of it working. I took one, it says it all. The skimmer has been on my system for just over a month now and you can see that if it is set up correctly and used like it was meant to be it will give you results that rival skimmers which sell for hundreds more! The break in was approximately 1 week. The results are the thick black coffee looking nasty you see in the pic. You will not find a skimmer that is this effective in this price range.