2 plants 15 gal res. Week 6 flower as well. Well my ppms jumped 250ppm in 1 day and My PH 1 point. So that would lead me to believe they are just eating allot. That an excellent idea about freezing the pH down...I would have to add it to a 2L soda with RO water to make it last more than a few ice cubes. My plants look really healthy are are beefing up noticeably. I haven't really made any mistakes I know of...I wonder if this is indirectly related to molasses? Did you add any? They must just really dig it. Ill keep adding RO water to top off....I figure buffers will only hurt me at this point, they will keep trying to raise the PH so RO seems best. Am I right on that?