Random question, I am still new and was wondering why didn't you run a canister filter on your 135? I bought a 110 for my 38G and returned it and bought a canister filter instead and it has been running great but now I am second guessing it because of the GPH 500 vs the 265 on my canister, the AC sucked up the **** up quick!punman said:I run two AC110s on a 135 gallon tank with five adult frontosas. Only other thing I do is run a Koralia pump for five minutes twice a week due to a "dead spot" in the tank. This just moves the debris around for easier pick up. If I had more fish I'd add a third AClear.
Two AC 110s I'd say would be best for a 90-110 gallon but it depends upon the messiness of fish, feeding, quantity of fish and so on.