I have a tank I am building and I am trying to decide which pump to order. The tank is a 60 gallon rimless marineland which has 1" bulkheads and has a 20 gallon sump beneath. The height of the tank is 57" with the return coming out slightly below that. I plan on adding a check valve and ball valve to the return if they will fit. As of right now I am leaning towards the EHEIM brand but that is up for discussion of course. This is the first time I've planned a sump tank from scratch. (I have set up others with equipment purchased in packages before).