Reply To: Ideal number of fish in a 10 gallon tank Welcome to the website! › Forums › The Celestial Pearl Danio › Habitat › Ideal number of fish in a 10 gallon tank › Reply To: Ideal number of fish in a 10 gallon tank September 8, 2007 at 3:39 am #12107 atlantis_childParticipant I think that should be fine. Definately not too few or too small. Java moss is good to use too. Sandy bottom more natural to these fish. – Atlantis Child