Thought about the ammonia too, we are getting trace amounts, not quite to the first color on the card, and I am doing 25% water changes every second day. Using RODI water. Had to take Flame Angel out of the QT and put him back where he was, we was not tolerating the copper at all even at 1/2 dose. When I got the Achilles he got a fresh water dip before going into QT, no chemical but had a cleaner shrimp with him and he is doing great. I can't seem to keep a Powder Blue alive.
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