Multiple buffers at the same time? (different pH) - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 08-15-2018, 01:07 PM Thread Starter
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Question Multiple buffers at the same time? (different pH)

Lets say I am using neutral regulator or proper pH 7.0 to adjust my water to 7 and then I add that water to an aquarium that has crushed coral substrate.

I know CC buffers at around 8, and with the water already buffered at 7, what interactions will occur?

Thanks!
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post #2 of 3 (permalink) Old 08-15-2018, 01:15 PM
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Originally Posted by cds333 View Post
Lets say I am using neutral regulator or proper pH 7.0 to adjust my water to 7 and then I add that water to an aquarium that has crushed coral substrate.

I know CC buffers at around 8, and with the water already buffered at 7, what interactions will occur?

Thanks!
Uhm... the tank water would be buffered to 8ish?

Not sure why anyone would want to do this.... Any reason in doing so?

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post #3 of 3 (permalink) Old 08-15-2018, 10:01 PM
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Quote:
I know CC buffers at around 8
This is not correct. The PH you get from calcium carbonate is strongly affected by the salinity of the water. So in ocean salt water you will get a PH of 8. In a fresh water aquarium with calcium carbonate your aquarium PH will be very close to 7. The link below has some good information about calcium carbonate:

Based on your other post I responded to your tap water has a lot of dissolved CO2 in it. If you let your water sit in a bucket for a couple of days before adding it to the tank your PH will probably climb from 4.5 to close to 7 or 8. Depending on your fish you may not need to adjust the PH at all before adding degassed water to your tank during a water change.
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