Ph Liquid Changes ppm

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Hello. My ph liquids changes the ppm of the water. Is this something normal or are they spoiled? Both minus and plus changes the ppm. I bought them like 3 years ago.
Hesi pH+ PLus Growth and bloom
Hesi pH- Minus Growth
 
Not sure about expiration dates but would expect them to add some ppm to water.
Additionally, I can't be sure as its not a brand I've researched but you suggest the pH adjustment has nutes ALSO?! If so then the increase in ppm will be relative to its suggested contents...
Advise you measure out a litre of each and check versus what Hesi say it should be.
But checking if in date first is a good idea, maybe a date stamped on base or just use it as suggested, if the girls grow, you maybe alright!

Good luck.
 
Yes, of course anything that adjusts pH up or down, any fluid not at neutral pH =7, will contain salts/ions, what ppm measures. These salts/ions in solution increase or decrease pH as you add them, with you controlling this by the amounts you add.
 
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