I was also using ACV as an activator, and I did not notice any particular problems. I have also been using ACV in a few other things. I am not convinced that it is bad for Candida ... but I am still unsure.
There are lots of people who swear by ACV, including for Candida. There are practioners who say it is great; but, there are other practitioners who say that those with Candida should avoid it.
It is up to you of course, but if you are worried about it, why not use a nice organic lemon juice? Everyone agrees that lemon juice has healthful properties. If you are convinced that ACV is great, and like the way it works for you, then just stick with it.
The bottom line is there is a valid difference of opinion on this, and we are not going to be able to give you a final answer here. If you ask one naturopath, they might say ACV is great, even for Candida ... another one will say no, you must avoid it if you have Candida.
In this case you have to use your own intuition/listen to your body.