wil0311 270 tank build

[wil0311]

I still have one overflow working as a siphon. I just thought maybe the 1 1/2 inch line might not be able to handle the return. So instead of joining them before the sump I just run each to the sump. But I still can't run my return pump wide open. Oh well I guess I'll just have to throtle it back a little. It's a dart pump about 3500 gallons per hour. Does anyone have a return set up for this kind of pump?