for your size system if your having nitrate issues id spend the $400-700 or whatever to buy a sulfer reactor/bio denitrator and im shure that would keep them low enough that regular waterchanges would have you under control.
i tried a bunch of different things to keep my nitrates down and i probably spent just as much as if i bought the dam biodenitrator so i would just do it, in 6 months of 200g waterchanges that money will be gone down the drain anyway
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but what the heck do i know
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