Grow Mediums Dutch Passion Tony's thoughts on Calcium uptake and LED's

[Druid]

You think? It only ever happens in this tent under these lights, the other tent is grand. What I can say it that this is nothing compared to previous grows with these lights using little to no calmag at all. If I could just stop this shit from happening in each grow under these lights.

it looks like a magnesium deficiency to me, instead of calmag try some epsom salt from the pharmacy. that's magnesiumsulphate. mix it into the water with your regular feed and go from there. magnesium defs take relatively long to show up and to fix so continue the treatment for 3 weeks and see if the symptoms improve.