Heres the deal I 1st had the super skimmer 125 when the pump crapped out on me they sent me a whole skimmer and didnt tell me to send anything back. On top of that they sent me a 220 instead of the 125 so im happy about that HOWEVER i want more skimming so for now i rigged up a RIO2100 thats supposed to flow around 700GPH a 0' head but i switched the impeller to the needle wheel impeller that was on the old 125 super skimmer so who knows what it flows now. Now my question is does anyone have experience/recommend a Needle Wheel pump that flows around 500GPH? I really want my water change pump back and i dont wanna buy the stock one if theres better.