Howdy Reefers!!
I have used most of the calcium sources listed above and have been using Mrs. Wages in my topoff water for about 2 years with no problems. I think many of you overestimate the quality control practiced by many of the companies that supply our hobby. I do not mean to speak poorly of them, but as there is virtually no regulatory oversight of the industry except results attained by hobbyists (and let's be honest, there is a wide range of talent and knowledge, or lack thereof, in our hobby) they are trying to produce the best product for the least $.
Use what you feel comfortable with. I assure you, the more you read and understand, the more comfortable you become with less expensive alternatives, or at least that has been my experience and observation.
Just my 2 cents
Stan
I have used most of the calcium sources listed above and have been using Mrs. Wages in my topoff water for about 2 years with no problems. I think many of you overestimate the quality control practiced by many of the companies that supply our hobby. I do not mean to speak poorly of them, but as there is virtually no regulatory oversight of the industry except results attained by hobbyists (and let's be honest, there is a wide range of talent and knowledge, or lack thereof, in our hobby) they are trying to produce the best product for the least $.
Use what you feel comfortable with. I assure you, the more you read and understand, the more comfortable you become with less expensive alternatives, or at least that has been my experience and observation.
Just my 2 cents
Stan