Have some questions for you experts about growing in hydro (ebb/flow) but having HARD water. I have a good meter and have checked it and my tap water PPM is 345 to 350 range. I have no choice but to use my tap water, here are my questions:

1) What is the best PPM range to start out with ?? (before adding nutes)

2) Whats the best way to lower my PPM on my tap water to that ideal range?

Appreciate any help.
scottcc5s Reviewed by scottcc5s on . Hard water questions Have some questions for you experts about growing in hydro (ebb/flow) but having HARD water. I have a good meter and have checked it and my tap water PPM is 345 to 350 range. I have no choice but to use my tap water, here are my questions: 1) What is the best PPM range to start out with ?? (before adding nutes) 2) Whats the best way to lower my PPM on my tap water to that ideal range? Appreciate any help. :) Rating: 5