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danios (at least zebra danios) are one of the most forgiving fish when it comes to pH. As long as it is stable and not too extreme, they'll be ok. 6.5-8 is what Fishlore lists. This should fall well within the range of most tap water. It's important to note that you don't want to use pH Up or pH Down (or similar products). They don't do anything to actually change the pH in the long run, they just mess with water hardness and make the pH less stable.
They also are more forgiving when it comes to temp. A range of 65 to 75 is good. Personally, I would set it at around 72, since that's a good temp for most tropical fish. |