Thanks Chuck,

The drains are configured as a Bean Animal - 3 X 1.5" drains in total with the primary running full siphon. The drains will far outrun the return and should be virtually silent. The return should be good for about 2400GPH, but with the MP60's handling the vast majority of tank flow, I doubt I'll run anywhere near that through the sump.

The Red Dragon pumps are great - one powers the Alpha 250 skimmer. I also considered the Abyzz 100 (an incredible pump) but can't imagine needing more than the ~3000GPH provided by the DC Waveline even when including the manifold. I like the hot water tank concept, but with the sump in the stand it would be some work to accomplish. I think I'll wait till the tank is up and see how much supplemental heat is needed - then decide the next step.