Again..... liverock,carbon and phos media works great about the best youll get from your canister. Its like running 2 phosbans in your case maybe 4 lol it will keep your water perfect may I suggest a spray bar to add aeration your losing not running a sump. I think sumpless works,allways more than one way to reach a goal Goodluck
But seriouslly once a week is nothing if your trying to make do without a sump
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