High KH and GH, bad?

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Joined Feb 7, 2014

492 Posts

Here's what Tom Barr (acknowledged plant guru) has to say about the use of tap water versus RO & high GH/KH
http://www.barrreport.com/showthread.php/62-The-Estimative-Index-of-Dosing-or-No-Need-for-Test-Kits

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