Jtrch38 Posted July 22, 2021 Share Posted July 22, 2021 Hi all. I have a tank that is 3 months old. I am familiar with the nitrogen cycle and water parameters. I use API test kit which works good on other 3 tanks. This 20L though has had high ammonia the whole time and will not go away. It is a planted tank with eco complete planted substrate and Fluval 207 canister filter with two baskets full of Biohome Ultimate. After two months of high ammonia I decided to start doing water changes. I have done so many water changes I’ve lost count and this last one was 50 percent. Ammonia stays at 2 ppm even after a 100 percent water change. I think the tank is cycled but there is a steady source of ammonia coming from somewhere. I use reminerlized RO water and have no livestock in tank. Did a fishless cycle. Any ideas on where all this ammonia is coming from? Link to comment Share on other sites More sharing options...
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