They both have been on rain water to bring the pH and ppm down. Just gave some 1/2 nute with MgSO4 and humic added for the last two waterings and will go back to the rain water, at least on the left.
This is the first run though flower using way less nutes. I'm going by runoff ppm count mostly. Trying to keep it under 1000 using the rain water. pH is lower 6s when the count is above that and upper 6s when below it.
Comment