Thanks for the reply. I've already been through all the calculations with tank/sump size and water flow. I'm just curious to see the different ways to connect plumbing to the pump (Eheim 1260, internal to the sump), valves, tubes/pipes and how to introduce the water back into the tank (straight pipe, oscillating nossile, etc.). Some recommend pipe while others tubing. I'm building an overflow box (weir) and sump. I could put something together with plumbing from Home Depot, but would appreciate any tips. Thanks.
Dave