In a new aquarium autothrops need time to install, they do not grow that fast. At least 2 weeks to install a basic carying capacity. based on the ammonia introduced .Till then only a very limited ammount of heterothrops are installed to handle the organics. Introducing live rock will start up heterothropic gr0wth and mineralisation , ammonia is produced but if a lot of rock is introduced it will take two to four weeks before the autothrops can follow the heterotropic growth and mineralisation which includes ammonia production and reduction, As most organic carbon wille become inorganic during mineralisation heterotropic growth will be limited, not able to take up all ammonia produced, Introducing organic carbon may help to bring the ammonia level below the critical value but first of all I would remove most live rock immediately and leave only one peace untill the ammonia is controlled, Hopefully it is not to late for the fish. A level this high may also limit bactererial growth and inhibit nitrification, Change water after removal of most of the live rock if you want to try save the fish.
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