[Josh24]

Thanks for the responses.

Mark:
My caculations using the RC Head Calculator show 2100 GPH but I see you point. I should look to try and get 1000 GPH from my sump return pump and possibly 3000 GPH through the CL. The question then is how do I determine whether I get 3000 GPH through the CL when the calculator dosn't take into consideration the things you mentioned in your post.

When calculating the head loss on the CL I added 6 ft. as the pump will located just below the main floor to reduce sound. Should I not have done this?

Lost Mind:
My plans are to order a custom aquarium complete with holes in the rear panel of glass. No holes in the bottom. Thanks for the heads up though.