Phillip Posted August 6, 2021 Share Posted August 6, 2021 I’m trying to see if the water in my guppy tank is hard enough for them. I’m not sure how the tds plays in to it though. Should I make any changes based on these results? Gh: 10 drops 179 ppm Kh: 4 drops 71.9 TDS: 247 Link to comment Share on other sites More sharing options...
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