I have heard of those as a preventative, but if the bird is symptomatic you really just want to engage the corrid until they are better.
Also, just an aside, apple cider vinegar will corrode metal waterers, so you would need a plastic waterer if you want to use that to help prevent Cocci problems.
I used ACV for a bit when one of my coccidosis hens was young, but I found that they built up a resistance to the coccidia soon enough, and kind of forgot about it after that. Maybe it is good for young birds who are more at risk.
Garlic is fine if used in moderation, but I would wait till everyone is 100% better. These things are better preventatives than cures.