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It looks like maybe magnesium deficiency locked out calcium. Should I stop using reverse osmosis water? My well water is very hard 450 ppm

Here is one by the top of a plant 1 week into bud

The older plants show signs of it much higher than a splash would reach

Thanks for the reply. I tried flushing that one with cal mag plus to see if that helps. I last watered on Saturday morning for the rest and this group didn't show any signs of it until today. I did turn the light up to 1000 watts Sunday also.

Develops on older leaves. First saw it on the mother plants. brown yellow and some red spots. I may have pushed them too hard right out of the gate. On week one out of the aeroponic cloner. I started using a R O filter a month ago cause my well water is 450+ ppm hard. Should I flush them with...

My tapw water is from a well and very hard. 450+ppm that is why I used narrowed spring water. Reverse osmosis then a few minerals are added for taste 6-7 ppm. I haven't had any more get wilting leaves last night after I turned up the heater. Also I isolated my cloning room by closing the door...

I have an off brand aeroponic cloner 25 site. After having issues with stem rot, I started adding pool shock solution as suggested and added a cycle timer. No more seem rot but now some are wilting on the small new leaves. Room temps up till now 68-74 18 hours cfl light. Not too bright. 6...