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Even though I dosed the tank with BB? Wouldn't new water mess the whole thing up ?
Hello; A few posts back I read one of the links that was sent to you. It talked about how you can get false positive ammonia readings with a test kit. Has to do with free amonnia which is the bad stuff and other forms that are not harmful all showing up together. If you have not read those links, may I suggest they are worth reading.
I believe that was why getting the seachem ammonia alert device was stressed so much. At this point it seemes to me that you should go by that device. Am I correct in that this device is showing the ammonia levels to be OK?
On to another subject, the tap water and it's treatment. You asked if the ammonia is killing the bb. I do not know that the ammonia is the culprit. My take is that it was the chlorine and chloramine in the local tap water that was killing the bb. I believe you stated that you have acquired a new source of "prime" or the equivalent for treating the tapwater. Perhaps one of the other members with specific experience can verify this, but I do not think there is any danger from doing a water change as long as you treat the tank and the fresh tap water. I am also of the understanding that "prime" does not harm the bb in a tank.