hello everyone,,,,im looking for a refergium or a sump tank,,,,can somone explain the differences to me ,,,,i have a 72 bow ,,and am currently running only a canister filter ,,,im looking for a refergium or a sump,,,,looks like im going to have a custom one made. but i dont how big i should go. thank you in advance
p.s my tank is not drilled
p.s my tank is not drilled