Coral Calcium

I had read forums sent to Martha Clift. and she had mentioned there was a Brand of coral calcium that was around for 10 yrs. and a #1 seller for Japan and Europe could you please email me that information to bobscountry@hotmail.com. It is very hard to now which products are reputable. We got info at a Home Show in our town in Canada about Ericssons Alka-mine and do now know how good any of these products are. Can anyone help. Thank you
Chris Tweet