I started dosing this 5 days ago and so far my phosphates are still 0. My tank is a 125g with 30g sump but I have a lot of rock so I am dosing 5ml a day. Should I dose more or does it just take longer to show any phosphate?
Loudwolf trisodium phosphate
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How much did you dose and of what product/solution?
Randy Holmes-Farley
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Almost certainly you need to dose a lot more than your target concentration to account for binding to rock and sand, as well as uptake.
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