Running Return / Skimmer / Chiller on one pump?

[Todd]

Thanks for the advice. I am planning on building a custom sump, so I would be able to make the return chamber large enough to handle the 2000gph that would be required. I was thinking of having a large return chamber anyways to give me room to put probes, and a top up system in there.

Any way of knowing what the minimum size requirement would be to handle the volume?