I have the same canister without the uv
. The canister works great but I don't run it on my tank all the time. I just use it to run chem filtration on occasion like carbon. I did run it for about 2 months when I first setup the tank.
The problem with canisters is they are nitrate factories. Gunk gets clogged in them and breaks down to produce nitrates. So they require weekly or twice a week cleaning.
Live rock is the only bio filtration you need. I would consider getting more live rock or base rock and instead of the canister.