First of any person who knows anything about chemsitry or fertilizers should know that acalcium carbonate insoluble . Based upon that fact alone it is hard to make sence why I should naswer to anything else you might write. Secondly iI have no idea why AN cant put out a consistent product nor can I explain why their maxi bllom which is supposed to be one o part Floramicro and one part Flora bloom contains Calcium, but the analysis gurantee they themselves submitted for resitering their product does not list soluble calcium in Floranmicro nor do I know why it was not in the sample the submitted for testing nor do I know why it was not in the sample I tested. I can assure yout that it is very doubtful that three state testing labs, my university lab and my labortaory test equipment in my own home als showed no soluble calcium. For all I know they change things at will and make mistakes readily and/or often. I know that calcium carbonate if a orgainicmedia is available to the plany ts but calcium carbonate is not water soluable in inert media or aeroponics.
Here is a link to the California state test results.
http://www.cdfa.ca.gov/egov/is/fert/fert2.asp?ID=5452 I really don't think they have anything to gain giving false test analysis reports nordo they gain in holding up AN registration on MicroBloom and its many other products until the gurantees stated, the gurantees on there few laebels that contain them and the test results match. The other manfacturers seem capable of accomplishing that and obtaining registrations. Maybe one day AN will be ethical and honest enough to get a few more of ther products registered. They wont accept the excuse it't proprietary information. they just wont allow it to be sold or distributed in their states. Simple enough.
I just checked Washington states Department of Agricultures lastest posting and they show Micro as containining 5.4% calcium. The AN Micro I tested about 18 months ago tested at 5.1%. I don't consider AN reliable, ethical or even near the best nutrient supplier. Of the major retailers I fing GH about the most honest marketers and their products the most consistent and reliable. They are also way to expensive but at least they are cheaper than AN. That and they don't put out all the trash formulations and supplements such as put out by AN. AN definitely does not have a good reputation amongst horticultural reasearchers in academia research labs or any state agricultural departments that I know of.