Do you have access to a water report. Your hardness might be due to carbonates and bicarbonates, and your Ca and Mg might be reasonable.
You should know your water chemistry before adjusting. Most cannabis strains are happy with 80-130 ppm Ca. Too much calcium can affect efficient uptake of other cations, like K, Mg, and Fe.
You should know your water chemistry before adjusting. Most cannabis strains are happy with 80-130 ppm Ca. Too much calcium can affect efficient uptake of other cations, like K, Mg, and Fe.