I'm teaching my baby to swim and she became too big for our bath tub. We have a Jacuzzi outside (Portable Inflatable Spa) and I want to use it as our place for swimming lessons. What kind of chemicals can I put in it so it'll fight the bacteria. Are there any safe methods/chemicals which will b safe for the Spa and the most important for my baby. (She likes to drink the water , well sh swallows a bit of it.)