MMS2 is Calcium Hypochlorite. Im not familiar with that as thats not what I used. That said I would get the Sodium Chlorite (MMS) it is very inexpensive and use that, whilst using the Miracle-Mineral-Supplement 2 internally if thats what your planning. From the research Ive done Miracle-Mineral-Supplement 2 is stronger and for more advanced disease states. So whatever you do, go slow and be careful.