Hi Jennifer. Yes, no and maybe. Will Bleach kill MAC? Yes. Is it a poison and dangerous? Yes If you splash it in your eyes or breathe in the fumes, is it dangerous? Yes. It is clearly stated on every bottle. Will it clean the inside of a Shower Head that you cannot see inside of test on a daily basis? Inconclusive at best. Common sense says no. You cannot be assured something is clean that you cannot see. He also suggests doing so once a month. What happens on day 20? 25? 40? etc. The answer is, you do not know. Shower Heads do not come with an expiration date or a gauge to tell you when they become toxic. And, taking down your shower head once a month? I don't think so. Then we get to filters. I go back to yes, no and maybe. Why because again of their changing and not knowing when they are filled and doing more harm than good. Also, The 'filter' in a consumer setting just looks like the perfect substrate for bacterial growth. If anything - it would just make matters worse as it would provide a lot of surface area for bacterial adhesion/growth. Mycobacteria are really small (about 1 micron in diameter) so pretty much any filter that would exclude mycobacteria would have very limited flow rates. I hope this helps. The Shower Clear Shower head gives you the ability to open, see and disinfect daily after every shower. I like to keep things simple. Please contact me with any questions and concerns