40*40 first Grow

Well my biggest lady shows signs of stress. The leaves are taccoed, pale and curling. I suspect calcium and magnesium issue due to my very soft water. I added calmag product to the water and regulated the pH of the water to 6.3 The issue continues. I decided to remove the sick leaves to give her some room to breathe. Also the top was removed just as an experiment if the plant can recover at all. On the last day the new shoots look okayish But now all the other plants show signs. Yellow leave tips from the top of the plants. I figured that 95w for the grow area is too much at this stage and reduced the light to in average 20DLI at a lamp height of around 30cm + ~50% power.