First Grow - 4 different strains

After the first week of introducing nutrients 3 of the 4 plants are well into flowering, the Purple Merkel is still a bit behind but is showing a lot of promise. The Critical Churchill is showing signs of Calcium deficiency so I added CaMg+ to the nutrients mix. Im mixing 5L with the ratio above which gives 450ppm and an adjusted PH of 6.3. I'll be giving nutrients every other feeding and keep it simple with PH adjusted water in between.