That's the way to use your head for something other than a hat rack!
Just add CalMAg and treat it like any other source of distilled water.
If your water needs rise, or your air humidity drops and you can't get enough from the dehumidifier, you can take UNSOFTENED well water and cut it by 50% with dehumidifier water to yield a solution at 200ppm, assuming that the hardness is from primarily dissolved limestone.
stinkyattic Reviewed by stinkyattic on . Help, It's getting worse I moved these 2 plants from a grow cabinet I had in a garage to the flower room in the basement. and I noticed a couple days ago a few spots on a couple leaves. I thought it was bugs so I have been spraying with neem oil.This morning it spread to more leaves and now it is taking over the plant. It is 83 degrees and 55% humidity. In soil, using GH 3part +calmag,liquid karma,hygrozyme. watering with this every 2 days. Rating: 5