I had a problem with introducing my new fish directly into a co2 tank after they had never been in one. they were shipped to me and pretty stressed also, so I ended up removing the co2 and raising the pH a little higher until they adjusted to the water. they were guppies so I also added some salt, which may or may not be recommended for angels. I'd consider adding a co2 line to the quarantine tank so they can adjust to the pH. what is the ph in the quarantine tank?
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