Leo2o915 Posted June 3, 2021 Share Posted June 3, 2021 Is that 7 or 7.2 ? Gh at 5 KH at 4 TDS 167 from RO water with equilibrium Link to comment Share on other sites More sharing options...
Guppysnail Posted June 3, 2021 Share Posted June 3, 2021 I vote 7.2 it appears more blue than green. I struggle with api colors sometimes too and learned instead of exact matching I go for is it more one color than the other and assume it is in between but leaning closer words one or the other. Can’t say it’s the right way to judge but it’s what I do. 2 Link to comment Share on other sites More sharing options...
Guppysnail Posted June 3, 2021 Share Posted June 3, 2021 Also look at it in a sunlit area it makes them easier to read in natural light not direct sun Link to comment Share on other sites More sharing options...
RyanU Posted June 3, 2021 Share Posted June 3, 2021 I agree with what @Guppysnail said. It looks to be 7.2. I also have trouble telling the color correctly. One thing that was suggested to me a while ago when I first started the hobby was to take the cap off and look directly down the tube. 1 1 Link to comment Share on other sites More sharing options...
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