If that is calcium def you caught it day one. As far as the mag def if it is the purple stem you are looking at it may be the strain. Other than that I dont see it. I have purple stems on one of my strains not sure off hand which one.
I like Epsom salts for mag. Of course ro has no calcium. Cal.mag wont hurt anything. If you are using a living soil you need to feed the soil not the plant. What beneficial microbes are you using? Are you using teas? A cold processed cold water Kelp, worm, molasses, is a good tea for feeding the soil. Neem meal is great for pest management and nitrogen for grow. Alfalfa is always nice. You can topdress with any of those of course. Perhaps you can research them all and see if any fit in your current regimen especially if they fill any voids. Humic and fulvic acid are great. Silica is great. It can be as simple or complex as you want it to be. As I stated I think earlier my new plant is going to get teas for feeding with very little additional amendments.
Do you PH your water? What is your medium other than a layer of living soil. What are the constituents of your living soil?
The fert that arrived today is for veg, it’s roots organics. It has;
Feather Meal, Bat Guano, Fish Meal, Non Gmo Soybean Meal, Chicken Manure, Langbeinite, EarthWorm Castings, Volcanic Rock Dust, Non Gmo Alfalfa Meal, Crab Meal, Greensand, Volcanic Ash, Dolomite, Blood Meal, Fish Bone Meal and Nettle Leaf. Also contains non plant food ingredients Humic Acid, Beneficial Bacteria and Beneficial Fungi.
Also the organic calmag I picked up is Blue Planet Nutrients. It has more than just calmag;
Nature’s Living Soil is what I mixed with ffof and perlite with the bottom third as directed (slightly less), so the roots hit a mixture, not straight concentrate. I wanted to do that rather than complete living soil as people have mentioned that ffof is too hot, so I figured just let them have the soil to start until they grow enough for roots to hit further down when more established. Ingredients in that are; Organic Earthworm Castings, High Quality Bat Guano, Blood Meal, Bone Meal, Fish Bone Meal, Alfalfa Meal, Kelp Meal, Dolomite Lime, Azomite, Epsom Salt, Coconut Water Powder , Aloe Vera The Microorganisms: Microorganisms:Glomus Aggregatum, Glomus Etunicatum, Glomus Intraradices,Glomus Mosseae, Pisolithus Tinctorius, Scleroderma Cepa, Scleroderma Citrinum,Trichoderma Harzianum, Trichoderma Koningii, Saccharomyces Cerevisiae,Azotobacter Chroococcum, Bacillus Amyloliquefaciens, Bacillus Azotoformans,Bacillus Coagulans, Bacillus Licheniformis, Bacillus Megaterium, BacillusPumilus, Bacillus Subtilis, Bacillus Thuringiensis, Paenibacillus Durum,Paenibacillus Polymyxa, Pseudomonas Aureofaciens, Pseudomonas Fluorescens.
I’m sure it sounds quite overkill, but everything is being used in moderation. I’m definitely going to add molasses to my water as kind of a “tea”, but don’t want to actually do a full tea as the living soil and light-spread out top dressing should be plenty.
As you can see my soil should be well fed, but if you have any suggestions for adding anything other than molasses to feed, what I’m feeding my soil, I’m all ears. Thanks