Ph Difference - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-12-2010, 09:18 PM Thread Starter
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Ph Difference

I currently have three tanks up and running. All three tank's ph is sitting between 8.0 and 8.2. My tap water however, is 7.2, even after letting it sit for up to 48 hours. There is nothing that all three tanks have in common except carbon filters and mopani wood. Two are gravel the other is Flourite Red. Two have live plants, the other does not.

Does anyone know why there is such consistency between my tanks but such a divergence from the tap water?
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post #2 of 3 (permalink) Old 04-12-2010, 10:26 PM
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What kind of gravel is in the 2 gravel tanks? Some gravels have a buffering capacity - ie black gravel is often made of marbel chips and will raise your ph. That doesn't explain the fluorite red tank though. Perhaps someone else will have more insight.
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post #3 of 3 (permalink) Old 04-13-2010, 01:21 AM
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Do you have any rocks in the tanks?


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