8 oz of pure coconut water contains around 10 grams of natural sugars. I would advise against drinking this much at one time, but mixing a small amount in the drink shouldn’t present a problem.
However, I do have a problem with the Vitamineral drink itself. The problem I see is that it contains cellulase. Cellulase is an enzyme which, among components of its construction, contains glucose. In addition, the breakdown byproducts of cellulase are sugars which logically can feed the Candida. Sorry, I know you didn’t want to hear this, but I can’t keep this type of information from people who are trying to cure a Candida infestation. If you find that your Candida symptoms are not improving, this drink could be part of the problem.