What are you using to test the pH?
Is it a test strip, a liquid test lit, a had meter, or a meter that sits in the water all the time?
It is important to test the pH at the same time of day every time you test. Testing pH is not important IF the water salinity (SG
) is in range (1.023 - 1.026) as tested with a refractometer, AND the Alkalinity, Calcium, and Magnesium levels are all in the proper range.
As Mike said, a PWC
done on a regular basis (10% every week) should maintain stable parameters. It is important when doing a PWC
that you mix it to the correct SG
to match the tank (or close if you need to adjust the tank either up or down). The PWC
water should be mixed in an open container for 24 hours before doing the PWC
. This allows all the chemical reactions to stabilize.