Camco Drinking Water freshener is a Sodium Hypochlorite solution.  That's right, its 
chlorine bleach.
Bleach is basic (alkaline).  ACV is Acidic.  If whatever you have growing likes an acidic environment, adding a small amount of mild acid isn't going to help.  Adding a good amount of something very basic (alkaline) may.
If whatever is growing likes alkaline environments, adding more bleach isn't likely to help.  Adding a strong acid likely will.
And of course don't mix cleaning solutions, and do stuff in a well ventilated area, whatever you are doing.