Ok, this is going to be a rant… (not meant to be personal in any way).
It is hard to tell the form of calcium in that Biolink Cal Plus product. Calcium carbonate complexed with organic acids is not a real chemical species. You either have calcium complexed with organic acids, or calcium carbonate (chalk). The complexed calcium should be soluble and available for uptake by the plant, but calcium carbonate is very insoluble in water. So hopefully it is the former, rather than the latter.
The product very well may be produced by the action of organic acids on calcium carbonate, but during that process the calcium carbonate should be dissolved to from Ca bound to the organic acids and CO2 gas. But the darn label should say exactly what is in the product and not obfuscate the true form of what is in there.
If the stuff is chalky, I would probably not re-purchase it at that price! My $0.02 as an environmental chemist.