What model is it? If you google it there are tons of mods. I had a CSS65 and a CSS220 and loved them both. Take the impeller out and clean inside the motor housing well too. Also, the inlet for the pump. There are a ton of impeller mods... I think for the price they are pretty good, but I did have to adjust mine frequently before I got an auto-top off. ATO is the way to go. It should help keep the water at a consistent level, which with those skimmers is important.