P peanut81 Active Member Aug 10, 2009 #1 i have a gallon of gh hardwater micro and i just got a ro unit so my water is at 0 ppm do i need to add cal mag? if so how much ?i have read everything from 1ml per gal to 10 ml per gal thanks for any help
i have a gallon of gh hardwater micro and i just got a ro unit so my water is at 0 ppm do i need to add cal mag? if so how much ?i have read everything from 1ml per gal to 10 ml per gal thanks for any help
