I added roughly 100ml of Soda Ash to the tank to raise the Alk level. I then did a test...it was kinda to soon...and I found that the Trident reacted to the change and the KHD did not. The KHD showed 8.1 DKH before and after were the Trident showed 7.89 and 8.25. Interesting wouldn't you say. It may be the way they test, and thus, the delay.
Both, the GHL and Apex PH levels reacted to me adding the soda ash.
Both, the GHL and Apex PH levels reacted to me adding the soda ash.