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Thread: KH and plants
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Old 04-18-2012, 01:57 AM   #5
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Try doubling the sample water used in the test kit. Instead of 5 ml, use 10 or even 15 then count the drops to get a more accurate measurement of your kh.
Also, I think even if using RO water, there will be some kind of buffer due to aquasoil or tannins etc.

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