kh ,gh test anytime? - The Planted Tank Forum
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post #1 of 2 (permalink) Old 02-12-2019, 10:20 PM Thread Starter
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kh ,gh test anytime?

does it matter time of testing meaning lights on off i know ph changes when lghts on ? but what about kh gh
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post #2 of 2 (permalink) Old 02-15-2019, 07:07 AM
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It does not matter. KH buffers the impact acids such as CO2 has on the pH, but CO2 and lights do not affect KH readings. GH should not be affected either.
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