· Fresh Fish Freak
Why are you feeling the need to counteract it?
You only measured one thing but when you change the water, you add many things. Plants grow in hard water.Moonfish and Hoppy, I had a previous tank where I used to mineralise the water with mag and cal during water changes. This tank stopped growing on me once despite it having all the ferts it should have needed. I read an article about hard water being a problem and so I measured and found GH over 15 not including the kH component of 3. I did a 75% WC and the tank took off and grew well for two weeks without doing anything else to it.