help me understand my pH

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holyherbiness

holyherbiness

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Apr 7, 2004
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Hey everyone
the tap water where i live is pretty neutral at about 6.9-7.1

How come when i change the water in my 110 gallon tank that has a pH of about 7.4-5, the pH stays the same after the change?

I change about 40 gallons of water each time, and the pH remainss the same or goes down .1

any suggestions? something to do with "buffers?"
 
R

RTR

AC Members
Oct 5, 1998
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Braddock Heights, MD
To really understand your water's behavior, you need more test results, some under very specific conditions:

1. The pH fresh from the tap. Is this the pH 6.9-7.1 given?

2. The ph after aging in a shallow bowl overnight, or after vigorous aeration about 1/2 hour.

3. The KH of the tap water.

4. The KH of the tank water before a water change, and the nitrate titer at the same time.

Then we can give you a fair outline of what is going on.
 
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