Hi Guys, I just want to recommend a DC water pump for you guys. http://amzn.to/29D3yRD I have a 60 gallon reef tank and a 500 gallon koi pond now changed to this. for my reef tank, I use a DC voltage controller to control the flow rate, I put it to max 24V 410GPH. It is DC powered, so I connected 3 with solar panel without DC to AC inventer. to create 800GPH for my Koi pond just my 2 cents to share.