I'm kind of confused, Carol. The citric acid in regular bath bombs (and milk baths without slsa) do make fizzes in your water. Citric acid in bubbling bath bombs help the bath bombs break apart in the water but you don't noticed fizzing with the mounds of bubbles coming from the bubbling bath bomb. Bubbling milk bath also produces mounds of bubbles so again - yuu don't notice the fizzing of the citric acid. That's been my experience at least. I've even used bubbling bath bombs that do not have citric acid so take a little more work to break apart but eventually they do so again - citric acid not really necessary. I dunno...I've made plenty of recipes of all things mentioned above and tested, tested, tested (as I love baths and take one at least once a day)...that's just been my experience though. Jen