New to the ACV therapy

I have just discovered the apple cider vinegar information for my husband who seems to be experiencing heartburn for the first time in his life. It has been going on for about 6 months or so and he will be 53 in April so I hear this is kind of normal at that age. Anyway, I found info about the ACV and bought a bottle at the grocery store. I have a few questions for those that are experienced with this.
1. Does it matter which ACV that you drink? (I've seen the brand Bragg's)
2. How much to drink, how often and when? (Does one just drink it daily or only after a meal that you know, normally caused heartburn)
3. Does the ratio of water to ACV matter?
4. Can it be mixed with anything other then water, like juice or something to make it a bit more palitable?

I am so thankful for any help that you can give me. I love finding natural, simple solutions to problems. What I love about this site is that it is filled with helpful, knowledgeable people and I thank anyone who takes the time to respond. Tweet