From my understanding, clear acv has little effect. The cloudy acv with "mother" is what helps. If you suspect candida as the cause of your white tongue (rather than bacteria) while acv might help to some degree, using it alone might not be enough. Usually, there are many more symptoms than just a whitish tongue, though many don't realize they are all interconnected. Suggest looking at other candida symptoms and considering a full candida protocol.