Thanks for asking us, but I'm really sorry- I can't say I've ever heard of Red Bush Tea, though I do know some mums use baby teas to help with their bubs. Have you spoken to a Naturopath, maybe from a health food shop? Perhaps they could give you some information on it?
There are lots of different things that parents try, and it can be really tough, as there doesn't seem to be one treatment that will work for every refluxer (if only!!). The best advice given to me was to trust my instincts, and to do what I felt comfortable with (also keeping in touch with my doctor too).
If you do want to try it, then I would suggest doing a lot of research, and finding out from well qualified therapists who have a lot of experience with reflux babies not only how to use it, but what kind of effect it has, and what the active ingredients are (and of course how safe it is in babies). And of course talk to your doctor if you are concerned,
Sorry I wasn't able to help, but please let me know how you get on
Reflux Infant Support Association
Note: This information is general in nature and should not replace the advice or care of your doctor.