Hydroponics Forums Discussions - do you need to know what your tds and ppm

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Sandy

02-13-2009 07:15 AM

do you need to know what your tds and ppm

ron- do you really need to know what your tds and ppm are or can you get along just monitoring ph?

Ron	02-13-2009 07:15 AM

I can't imagine growing without either.

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