Mark,
QUOTE:
For the CL intake could have it lower to help move the water a bit more. Also the flow seems very low.
Thats what I thought but thats what the calculator kicked out! The pump will be located 6' below the tank but Im suprised the the GPH is that low.
QUOTE:
I've got a Dart and had the impression they are a hi volume but low head pump. Good for CL, but not return, might want to recheck the curves.
http://www.mdminc.com/Dart.htm 50g isn't that big of a sump, specially considering it won't be filled to the top, sure you would want that much flow anyway through it?
I checked the link provided and the return pump is listed at 2000 GPH with 10 ft. of head. Should I be concerned about the sump only being 50 gallons considering the main tank is only about 86 gallons? What would be the downside to having that much flow through the sump?