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Yes that looks like cal-mag. Have you bumped this up to 80% nutes yet If not do so. If you have go to 90%. Remember it has only been a couple of days since you ditched the tap water. If 90% does not fix it just keep raising it even to 120% if that does not cure it trash it. I have had plants that genetically could not absorb cal-mag?OK @Mañ'O'Green and @Waira — dramatic improvement on the ladies, all except little 13 day old Meph Ripley OG. This looks a little different and affects the new growth as well, where it is faintly visible on the tips. Can I add cal mag to an existing reservoir?
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