Quote:
Originally Posted by Wingin It
IMO, no need to even let it age. I've bred Bettas on freshly declorinated tap water...they're not fancy fish. If you want to make him feel really good, then add some Almond Leaf Extract or an Almond Leaf...they seem to like it.
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Beta typically live in dirtier water. Labyrinth fish haave two sets of lungs that allow them to breath our air when needed. Thats the reason they gulp at the surface and that some people feel its ok to let it live in a tea cup.
Some people add "black water" additive for betas as well.
So... sure RO is probably ok... but overkill for a beta. Save your money.