I think I have the 125 one, works pretty well for the price, Previous poster is right, it is a picky/tricky skimmer, sometimes it will not reach over into the collection cup, other times, it'll boil over like a volcano. What I've found is it is very finicky with the height changes and that red dial only needs a very little tweak, any more and you will over do it one way or the other. Run it in the sump is best otherwise it is an eyesore and may have a lot of bubbles. Also don't count on the collection cup, drain it into something larger. Don't recall if the 65 model has the cup w/ the drain option.