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[monza]

Richard
I'd say Bob was right maybe a little early for that many fish. Anyways you should try and get your nitrates down. How often and how big are your water changes? When did you put the fish in and how long did they live? What corals do you have? What and how much did you feed the fish? Do you have live rock?
I’m not up on my rena xp3 canister filter with phos gard but to you keep all your filters clean and change your media regularly. IMO I'm not a fan of units like that and think a sump and live rock is a better option.What is a sum water scruber?
The rest of your equipment sounds great and no, I'd not be in a rush to buy more fish until we're sure your tank and conditions are right.
Welcome to Canreef!

Dave

Don’t mind Bob and the spelling stuff he’s some old guy we let hang out, he used to teach spelling in the army or something like that, and he’s a good speller!