I would clean it out every two weeks. Deterius gathers quickly in that thing. If you're considering getting another 404, I would recommend you invest on more LR
instead. I see you already have 30 lbs... the $100 for a 404 could get a nice chunk of rock.
My reasoning is that canister filters aren't that great for SW
setups. They're nice for water flow, but they can gather deterius that can lead to higher nitrates. IMO
, one 404 is enough (even not needed, if you have 1.5-2 lbs of LR
). Most people just take the guts out of it and add in LR
rubble to help filter their water. How about just another PH
or two? I had a 404 and liked it... till I read up. I returned it and got a ton of rock instead... best move I ever made