I know that if I can just add conditioner (which I have) to my tap water I don't need to buy water for my Beta aquarium, but it makes my life a lot easier. The pH is right and I don't have to worry. I always have a few bottles handy and save myself a few steps when emptying the tank or changing the water. My only beta which is in a 3 gallon tank doesn't seem to have a problem with it and did well last year.
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