Quote Originally Posted by spectrum balanced
what about if you're using distilled and rockwool? is it generally good in all mediums but necessary with RO and coco?
distilled water has ALL minerals, etc removed ... as Stinky said, calcium, magnesium, etc.,, has to come from 'somewhere' ... and, if you check the pH on your RO water, you will probably find it to be very acidic :smokin: