We have a small 15 ft x 42 inch quick set pool we are getting ready to set it up we had one several years ago and used chlorine based pool chemicals. Our son has autism and is extremely sensitive to multiple chemicals and had a negative reaction to just the smell of bleach someone was using to clean with in a store bathroom. Feingold diet recommends pristine blue but I am nervous about it not be effective enough to kill bacteria, my son has a week immune system due to high levels of toxins in his body. Our home is pretty free of all commercial cleaners we use natural based cleaning products mainly vinegar, baking soda, washing soda, 20 mule team borax, essential oils, and enzyme based cleaning products. The BBB method sounds great except for the bleach. What are my alternatives?