I did not see this mentioned specifically but I may have missed it......also do not use ph ADJUSTING products for fish or aquariums. As Stinky said....stick with ph up and down for plant use.

PH TESTING products for aquariums are ok although some don't offer a large enough range to be helpful.
Weedhound Reviewed by Weedhound on . Soil Runoff pH, Flushing to correct lockouts- Why and how to do it! This is a common question that comes up when troubleshooting, so I thought I'd post up a little summin summin. Why do you want to know your runoff pH? Simple- it's an indication of how your water, fertilizer, and grow medium are interacting chemically. There are 3 measurements that are important to know when you are caring for plants growing in a soil or soilless medium. The first is the pH of your source water. Next is the pH of your nutrient solution after the fertilizers and Rating: 5