Reply To: How to breed Welcome to the website! › Forums › The Celestial Pearl Danio › Breeding › How to breed › Reply To: How to breed May 10, 2007 at 10:18 pm #11144 fishcop444Participant wow pH tolerance seems to be very wide… 6.2-7.8! I heard that at first reports they preferred low pH but then it was later revealed that they were native to slightly alkaline water…