Originally Posted by Andrew McFadden
I love the rena canisters filters that I had on mine but within the last few months I turned them off and only run a sump. My best advice is on tanks above the 4' footprint I start recommending sumps, there is nothing better.
+1 on sumps. Once you go sump, you will never want to use any other types of filter. IMHO
and IMHE, cleaning canisters is a PITA. I'd rather use HOB
filters in any tank that is not planted. You would need multiple HOB
and/or canister (and maybe a powerhead) to generate enough flow through your 180g. The only reason why I wouldn't use a sump is if your fishes are small or if overflow noise (sounds like water falling) annoys you. Small fishes always manage to find themselves into the overflow and into the sump, which in annoying to me.