Bill don't use that stuff, it is not food grad acid based so you can't use it for your plants.

To answer you next question Baking soda and Lemon juice make good Ph Up and Down but they do not last as long as the commercial versions do.
Zandor Reviewed by Zandor on . Granulated PH up/down ??? Can anyone tell me if you can use swimming pool PH up/down in granulated form to adjust the waters PH level for watering your plants? If so are there any precautionary hints that should be taken into consideration?? Zandor, my friend, if you happen to read this , do you run any sort of ebb and flow along with your drip watering system or is it entirely reliant on your drippers for your normal watering periods?? Peace Bill :D Rating: 5