HardcoreYobo;4193516; said:What would a "big tank" be? Gallon wise? Planning a 270 gallon, and I wanted to know if a sump would be good or just to have both?
I would do a decent sized sump myself. You have a lot more filtration options, and it would probably be cheaper than buying a couple FX5s or other canister. If you are going to build your own, a 75 gallon tank would work pretty well.