I found this when I was researching PH
What do you think?
Common myths about koi keeping "Roark"
Baking Soda Will Drive My pH Up To Over 9.5
Nope. Actually, it will peg it at a rock-solid 8.4. You can completely saturate a water sample with baking soda and never see a pH higher than 8.4. Baking soda is a strong buffer, and very useful as a water additive in carbonate-poor areas. In a properly buffered pond, the dreaded pH "crash" is an impossibility. Maintain your carbonate hardness (KH) in the 100 to 120 ppm range and you can forget about "crashes". Besides being universally available, safe to handle, non-toxic to children, baking soda is harmless to fish at any reasonable level (ie, < 500 ppm).
This interesting artifact is highly useful in testing the performance of your pH test kit. Make yourself a cheap and very reliable pH 8.4 reference solution by dissolving four teaspoons of baking soda in a cup of distilled water. The resulting 8.4 pH solution will show you how much (if any) your test kit has wandered.
I did "test" my PH tests (ECO PH meter and AP drops.)
My meter is off by .4 on the high side? The drops were off by a whole color using the above method it would adjust the measurement by .4 to a PH of 8.2.
My PH has always been high
Any Ideas?
Any Ideas?