I think I figured out why my PH won't go down - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 04-24-2008, 02:06 AM Thread Starter
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I think I figured out why my PH won't go down

I think I figured out what is keeping my PH buffered at 8.0

NovAqua that I have been adding to my tap water during every water change. I have always used it cause it says that it removes copper and other heavy metals. But it seems I failed to read the rest where it also says that it helps stabilize pH and balance alkalinity.

I will continue to do WC with 50/50, RO/DI and tap water. This time I will stop using NovAqu and Amquel and switch to Prime. Hopefuly this will get my PH down.

My GH is still at 7 and my KH is now at 4. Now lets see what happens in a months time after my WCs.
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post #2 of 6 (permalink) Old 04-24-2008, 02:13 AM
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You could collect waste water and RO water. The waste water is filtered and dechlorinated.
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post #3 of 6 (permalink) Old 04-24-2008, 07:12 PM
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Quote:
Originally Posted by Brilliant View Post
You could collect waste water and RO water. The waste water is filtered and dechlorinated.
That's a really interesting idea! Does anyone else do this? I'll have to do some tests on it tonight to see what I have there.
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post #4 of 6 (permalink) Old 04-24-2008, 08:53 PM
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You could collect waste water and RO water. The waste water is filtered and dechlorinated.
The waste water for DI and/or RO water contains all the impurities that you were trying to remove in the first place. By mixing that back with the RO water, then you are effectively adding back in tap water, aren't you?

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post #5 of 6 (permalink) Old 04-24-2008, 09:59 PM
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No, it doesn't work that way with RO units. You can test the waste water coming out of an RO unit and see for yourself. I've done it and found that my RO waste water had a TDS <50ppm. It would be a good way to collect declorinated water. I know people that do this with discus. They use straight RO water, and mix in the waste water to put some minerals back in it.
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post #6 of 6 (permalink) Old 04-25-2008, 11:19 PM
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The waste water for DI and/or RO water contains all the impurities that you were trying to remove in the first place. By mixing that back with the RO water, then you are effectively adding back in tap water, aren't you?
To a certain extent. Look whats happening now! Its a much better alternative.
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