I know simethicone will break up bubbles. It in the "gas relief drops" they sell for babies. I use it whenever my 84 year old Mother-in-Law decides to use Dishwashing Detergent in the Dishwasher !! ( I'm sure some of you can picture that scene in "Mr Roberts" with Jack Lemmon) Just a couple drops takes care of a foamy dishwasher, a bottle or two in the pool might work.