There is already Calcium there for uptake, it's in the tabs, it's also created by the microorganisms in the soil. This is a loving soil that makes the micronutrients itself. There is a lot more scientific detail we could discuss, and I suppose that's how your wired, but if you do the research you would find the answers. Bactrex and Mycotrex also aide in both protecting the plant and helping it with this symbiotic relationship. The led lights also will stress plants ability to uptake these nutes quite a bit, so Silicium Flash helps protect the plant against the led light stress and then it can uptake the Calcium in the tabs.
The entire concept of organic growing is to feed the soil certain things and the soil will create what the plant needs. This is not, I put Calcium in it takes Calcium out exact direct line always. Its organics, its more indirect than that, and I really don't want to get into all the details. Yes, you do add certain things, and yes, Calcium is one of them. Bone meal, blood meal, and other good stuff in the tabs gives you all you need of those micro nutrients.
If you want that direct type of growing then go with additives instead. This is not additives style growing. I hope you can better grasp what that means.
Sorry for the harshness bro, you just came across a bit pompous when a trip to the website for BioTabs would have solved your issue wondering where the Calcium came from.
Take care, sorry for any confusion or hurt feelings.
