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I find those types of foods are good ways to keep nutrients in the column. Part of the issue is accurately testing. I use Hanna ULR Phosphate checker the one with ppb not ppm. And I use Salifert for nitrates which has always done me well. With PO4 though, it's about having a presence of po4 not the amount. Same goes for NO3 but NO3 gets consumed at a faster rate. If NO3 is being consumed, then dosing is working for you!I'm going to definitely give that a read as I think it will help me also! Not to hikack the thread but if feeding isn't enough to provide nutrients to water column then what is best to dose? I'm trying stump remover personally right now and I'm adding a crap ton of it just to keep nitrates at below 5 or so! Are broadcast feeds also insufficient at addin nutrients. By broadcast feeds I mean things like Coral Frenzy, Rotifers, Reef Roids etc.