Ok I have 6 20 gallon tanks. These tanks will be going into a rack system of some sort. Maybe 2 wide and 3 high or 3 wide and 2 high. Not sure on rack configuration yet. Anyway all 6 tanks are drilled. No bulkheads though. I am assuming I will be needing to setup a sump correct? I understand how to get the tanks to flow into one central sump. But how do I have it flow back again to each individual tank? Maybe someone has a similar setup they could share photos of with me. I need input on where to go from here.
."