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Not the filter. It has new media and its not even in the QT tank for the second go around. (it's in my sump). I found an article that says instant ocean has detectable amounts of ammonia when new. Went on to say that it's no big deal with a partial water change into an established tank. This is obviously not the case here... So maybe I've found my smoking gun. The question just becomes removing the ammonia. It seems that relying on water changes instead of cycling may keep ammonia in check in the QT but it won't eliminate it.
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