Been looking for pumps and such for my new 185g and I know I need some help with this. The tank is L-shaped and the overflow is built in the back corner where the L goes together. It has a 1" drain in the bottom of it. If I use the 1" pipe to drain to the tank, can anyone tell me what size pump I need and recommend a good one? When it comes off the return pump I want to split it into a Y so that I'll have a return flow into each end of the L.