I had found on old threads questions about using eggshell powder but as calcium carbonate it will not readily dissolve to supplement calcium, i have also seen other threads that have people doing vinegar dosing to promote bacteria growth, my question is if you could dissolve the eggshell powder( boiled, baked, ground) into the vinegar and then use that to help add calcium to a tank while feeding the bacteria bed? or does the chemistry of the vinegar and the calcium change to much when the carbon leaves the shells in the form of CO2?



