I have been concerned about finding a shower head with holes larger than 1 mm diameter, as recommended by Dr. Falkinham in his 2021 article "Reducing Exposure to Nontuberculous Mycobacteria (NTM)." If anyone has been able to find one that you recommend, please let me know. Also, do most rainshower shower heads have larger than average holes? I was relieved to read in thorne's comment on Jan.31 that Dr. Falkinham says that you do not need a special showerhead as long as you set your water heater to 130 or higher, which I have done. Thank you so much for sharing that information. It really relieved a lot of my concerns. Donna Turnbaugh