rainwater? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 08-17-2009, 03:14 PM Thread Starter
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Is it good to do water changes with?
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post #2 of 5 (permalink) Old 08-17-2009, 03:48 PM
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Depends on how you collect it, what you store it in, and who you are downwind of . . .

Main concern would be metals (like zinc and copper) and organics (like PAHs) from your roofing materials if you collect off your roof.


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post #3 of 5 (permalink) Old 08-17-2009, 04:06 PM
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Possibility of acid rain?
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post #4 of 5 (permalink) Old 08-17-2009, 04:07 PM
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It is good to use, but needs to be filtered first. I've used it in the past and ran it through active carbon. I would also only pull from the top of the collection barrel so that all the object from the roof would settle to the bottom.


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post #5 of 5 (permalink) Old 08-17-2009, 05:37 PM
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Some people use rainwater for a cheap source of very soft water. Certain fish are triggered to spawn when the water hardness drops(simulating a rain) so breeders change the water with rainwater to simulate this.
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