I just got a used 40g breeder tank with a built-in overflow compartment along the back. The compartment is separated into 3 chambers; 1st two have "overflow teeth" and the 3rd only has a return "hole". Also, the tank is not drilled. My question is, what do I need to get this tank up and running from a water movement/filtration point of view?
TIA
Dean
TIA
Dean



