Gina - there are many shampoos and conditioners (and shower gels, natural deodourants)that contain natural anti fungals. Toms of Maine do a brilliant roll on Calendula (aluminium free) deodourant.
There is this natural brand that is EXCELLENT that do gels (I am not at home and forget the make, email or message me if you want the brand name), shampoo and conditioner. One mix is neem and propolis, one tea tree - all anti fungal. Any thing with pau d'arco or calendula will work well.