withanf Posted March 24, 2021 Share Posted March 24, 2021 Hi everyone. I'm working on getting harder water in my tank. I'm using RO water with Seachem Alkaline Buffer and Equilibrium. I'm trying to get a pH of 7-7.5. I was away for a weekend recently, so the tank went 2 weeks without a water change. Thought I'd test parameters before changing water, out of curiosity. My gH was 8 and kH was 6, more or less as expected, and my pH was 6.6. All tests were liquid API tests. I did NOT expect to find a pH under 7 with the kH still so high. My understanding is the kH will buffer the pH quickly up to 7 or so, then more slowly towards and above 8. How could my kH have remained that high but the pH so low? I really don't know what to make of it. Link to comment Share on other sites More sharing options...
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