YESCA73
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Its funnt you say that as i read a thread yesterday were someone said that plants grown under led lights use more calcium.he claimed something to do with the spectrum caused the plant to use more calcium.couldnt say if its true but i find ot more than coincidence you found that also.Thought I would give my two cents. I have been growing with the same lights for a little over a year now, and the biggest thing that I learned is YOU HAVE TO GIVE CA MAG WITH EVERY WATERING. Took me a while to figure out. Just consistently do 1 tsp per gallon and it should be all good. Some strains are worse than others obviously. Hope this helps!