Low KH effect on ph readings? - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 06-22-2019, 02:33 PM Thread Starter
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Low KH effect on ph readings?

So the general train of thought is that we try for a ph drop of 1 when injecting c02, and we know that the lower the kh, the harder it is to measure ph correctly. So how do we know if our ph reading is accurate?

Cheers!...Peter
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post #2 of 4 (permalink) Old 06-22-2019, 02:40 PM
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Quote:
Originally Posted by 75rimlesspete View Post
So how do we know if our ph reading is accurate?
By using a calibrated pH pen or pH controller. Keep up-to-date with re-calibrating the unit as per the manufactures spec. That is about the best we can do at the hobbyist level....

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post #3 of 4 (permalink) Old 06-22-2019, 03:12 PM Thread Starter
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By using a calibrated pH pen or pH controller. Keep up-to-date with re-calibrating the unit as per the manufactures spec. That is about the best we can do at the hobbyist level....
Yes I understand that it is important to keep our instruments properly calibrated. But what I was referring to was what they have on the "Seneye" website.

"buffer strength can affect the results from different pH measurement systems when used in lower KH solutions. This is because in low ionic strength solutions neither the electrical (in pH probes) or chemical (liquid tests) response needed for the measurement are strong enough. "

So are they saying that if you have a low kh of 1-2, you wont get a proper reading due to 'low ions"?

Cheers!...Peter
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post #4 of 4 (permalink) Old 06-22-2019, 03:29 PM
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I don't know if kH of 1-2 is too low. It might just take more time for a pH meter to stabilize. Potassium chloride can be added to increase the ionic strength of the solution.
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