I am interested in purchasing a larger tank for a fish only. I was looking at a 135 gallon. What size filter would I need. Size of tank is 72 x 18 x 25. I would like to stay with the emperor 400, would I need 2 for this size tank.?
Two Emperors would be preferred, but if I may recommend to you a Fish Only with Live Rock (FOWLR). It's a lot heatlhier and natural, not to mention beautiful My preference for fish only is to use live rock and a skimmer (a hang-on skimmer would do nicely).