@andyj Hello, and welcome to our group. I know the heartbreak of thinking of giving up something that you love to do. I feel certain that I caught my mac infection from our hot tub. We were in it every night. Hot tubs are a notorious hot bed for mac. This bacteria has become resistant to heat and chlorine. If you cannot give it up; at least use it without turning the jets on. The bubble's effervescence (mist) are what makes the mac airborne and easily inhaled. Also, empty and clean it more than usual. Try Googling 'Hot Tub Lung'. There are many articles about it. You can have the water tested also if it would ease your mind. I have a site of a specialty laboratory that can test it. We got rid of the hot tub after learning more about mac. I also avoid them at any resorts.