Sump Pump

[biggerstretch]

Over flow boxes work however I still don't trust them ... I have drilled the top back of several tanks and find that to work just fine. Get a sump return pump that will handle the head pressure you will have from pumping the water to the top of the tank however don't use too big of a pump as it could over power your filter in your sump .... use your return pump for just moving water to be filtered not for flow in the tank.