Sorry man. Didn't mean to hijack. How's that tang?
Ok. Not that that's out of the way... LOL...
How big is your sump gonna be? I only have a 30 gallon sump, but, I plumbed my pipes so they automatically drain 30 gallons from my tank to the drain of my house, and am currently working on a way to automate the water getting from my laundry room where my ro/di is to my fish closet. I couldn't even imagine how you do it with 100+ gallons...