Why doesn't it make sense?

so the cal mag and the nutes should make the ph perfect as long as i put the right amount in.

dang this is confusing lol im just a country fcker tryin not to fund terrorism.

Do i need a tds tester to make this perfect? or is my ph tester fine?
jbrand Reviewed by jbrand on . r/o watering I have a five stage r/o system that i would like to use for watering my babies. I have read and understand about using CalMag plus in the r/o water, but does cal mag adjust the ph? my r/o water ph tested with an oakton tester came up to 9. will i still have to use a ph up and down to adjust. I am using fax farm trio and have noticed that by adding the ff it lowers the ph to around 7.7 but of course that is still to high FYI i am using ff ocean forest soil. Rating: 5