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Rain water for fishtank?


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It depends. As a general rule, rainwater is soft and acidic. The USGS says the average pH of rainwater is 5.6. If you're keeping wild caught discus, tetras, some South/Central American cichlids, some cory cats, that's pretty darn good for them and about what they're used to. If you're keeping African Cichlids or many livebearers, it's not so good.  The good news is no chlorine, chloramine, or fluoride will be in the rainwater.  

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