@windwalker @alleycatkate @tinaesims Terri, thanks for the info! Kate, thanks for the scientific article. I found it very eye-opening and helpful! Tina, I’m an “aqueous geochemist” by training, which means that my career has been spent working with environmental issues related to water. I can try to summarize the article in layman’s terms. It showed the effects of different strengths of salt solutions on different species of mycobacteria and suggests that to stop the growth of MAC bacteria, you’d need a salt solution strength of greater than 6% salt in water. I believe that’s why Terri recommended using a 7% saline nebulizer. I also found the bronchiectasis site that @alleycatkate linked to in another thread (http://bronchiectasis.com.au/physiotherapy/techniques/inhalation-therapy-via-a-nebuliser). It recommended to use a nebulizer with a 6 to 7% saline solution. Does anyone have any suggestions on which nebulizer to get and whether I should also try the Aerobika or something similar? Thanks, Lori.