Plants require oxygen through their roots. If you pump to much air into the bucket it can increase carbon dioxide which will screw up your ph.
How To Use Progressive Web App aka PWA On 420 Magazine Forum
Note: This feature may not be available in some browsers.
Its still a learning curve but last night I manage to get all three plants and the the reserves spot on HOWEVER: The Biopharm pH Calibration pH 4 and 7, test solution just arrived and I definitely need to get a new ph Meter. This 5$ cheap one is off by minus .2 (not .02) at both the 4.0 and the 7.0 test solutions.
I'll try to budget one for next payday.
I looked up the yellow ones with the specs I gave above. They are available for less than $12 USD.I used one of the yellow ones from the Zon for about 2 years. Calibrate often and they work fine.
There's really no other choiceAs long as you know how far off it is you can still use it until you get a new one.
I eventually start using Blue Lab products. Expensive but they’re well worth the money in the end.