Heya Mike,
IIRC, my sump is 30x24 and has about ~10" of water in it (so 30-ish gallons).
If that is the case, he should be able to add more water to the sump and that should solve his problem. I think he said that wasn't the problem though which leads me to believe that either
a) his drain plumbing has too many restriction in it slowing down the flow
b) his drains aren't 1"
c) I'm totally out in left field and don't know what's going on
