Struggled for weeks to lower nitrates and ammonia levels, tried filter media and singpads, cleaned the tank every 7 days at 25% water changes and my levels were up same On a roller coaster I decided to try Algone, used up two packs in my double filter in a week, the last values began to drop but were not up to standard, bought a double Ax second filter as the tank is split and put two more a pack and now a week ago my nitrates and ammonia 0 are very happy, that should be on hand for an aggressive aquarium so I topped up
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