Reply To: Tank size and mates Welcome to the website! › Forums › The Celestial Pearl Danio › Breeding › Tank size and mates › Reply To: Tank size and mates June 25, 2007 at 6:31 am #11482 katkinParticipant I keep a couple of ottos in with my cpd’s and they are perfectly fine and certainly help with algea, but don’t seem to touch any hair algea I get. K