I have used this in combination with Prodibio Bio Digest bacteria in two reservoirs, one with nitrates at around 10ppm and the other at around 30. I have an ampoule Bacteria used per 25 gallon tank and two ampoules in a 90 gallon tank. I added a little Seachem Denitrate to each of the four canister filters to give the bacteria a good place to grow (in a bowl of each canister filter and in a dark bag in the back corners of each tank near the canister inlet pipes). with weak current). The dark bags each contain about a liter of denitrate and are thick enough to have protected centers where anaerobic bacteria must survive, while outer and high-flow canisters encourage aerobic bacteria. Within two and a half weeks, the nitrate levels in both tanks dropped to zero. Great. I've kept goldfish for decades and have always had nitrate issues. I've tried all sorts of products and this is the first that worked.
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