I am currently in the process of making a DIY wet/dry. Seeing as how my tank water level is low (55 long, 4 inches from the top), and I have an extra pump laying around, would it be okay to NOT use an overflow and just attach the pump to the PVC pipe going to the sump? BTW, my sump is a 10g, and my tank can hold a lot more than that in case a back-siphon occurs.
