30 gal only? draining back into a 250 gal sump from 1000 gal tank?
Awesome! It's all in the design of the over flow. I'm sure it took more
than 2 or three tries to get that down right. The sump is twice as big
as my largest tank. I hope you get what you want for it
Paul

John Lange wrote:

Freshwater game fish. Had it running for 2 years with the position of the
overflows I drilled, with the pump off the level fell about 30 gallons.

JOhn