I do a lot of hobby hydroponic growing. I have noticed acidity building up in some of my pots. I attribute it to the preferential consuming of potassium that leaves the nutrient solution more acid.
Today, I bought some marble chips. I placed a handful in several of my nutrient containers. My expectation is that as the solution becomes more acid, the marble will decompose giving of carbon dioxide and thereby consuming some of the acid. I will report on whether this keeps the pH above
6.0.Has anyone had experience with this kind of pH control?
Bill