Agri grow is a name I am familiar with and have used their over the top liquid (foliar absorbed) which was largely microbial plant nutrition. Talked on the phone with them a few times several years ago when I was looking for a microbial boost for my compost. I don't know the product in the op but do know that most "liquid calcium's" are very short lived at best. Any considerable benefit may very well be derived from enzymes in the slurry that are like a superfood to beneficial microbial life which in turn bring about better conditions for the plants.
That being said I have nothing but good to say about my interactions with agri grow and the products I used. Striving for healthy soil is something we all should do, balance in minerals and nutrients is good but none of it works well without good soil life (microbial life) and the enzymes that activate them.
Dr. Woods took a very rough and rocky, almost no soil farm in MO and after a few years no longer needed fertilizers or lime. He understands organic matter and the driving force of great soil biology.