Morning Peter,
>> that seems to work rather well.
>> I will also use the equation to cross check the PPM tester.
Can't you use the PPM Meter to test your water, to some degree?
You should be able to tell good from bad water. Not exact impurities
but total impurities.
Yet, from what I learned working with plant nutrient solutions, a
PPM meter cannot measure PPM of a given nutrient. Special meters
exist that can measure a single nutrient.
The PPM meter is much like an EC meter, you get total readings that
leave a lot of guesswork.
The only true way we have found to work with PPM is to calculate
based on weight and analysis.
It gets reasonably simple and reasonably accurate by doing it that way.
Wayne
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