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This is a discussion on Can someone tell me what 012 means? within the New Growers: Ask the Senior Members forums, part of the New Growers category; I tested my rainwater with a TDS pen. It read 012, is this good, bad ...
I tested my rainwater with a TDS pen. It read 012, is this good, bad or average?
If it's bad, what do I need to do about it?