Machete Posted August 17, 2021 Share Posted August 17, 2021 Hi everyone, The water in my planted tank is testing in the range of 150 ppm GH (I'm using Aquarium Coop test strips). I don't have any rocks or substrate in that tank that would raise general hardness so much, so I am wondering if it's the fertilizers. I'm using ADA Green Brighty N, Neutral K, Iron, and Mineral. Coyld any of these affect GH? (Note: I was using Green Brighty K until a couple of weeks ago when I changed to Neutral K, but the GH high levels persist). Thanks! 1 Link to comment Share on other sites More sharing options...
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