i completely forgot that the recipe on the back of the CK isomalt bag called for distilled water but i dont have any. Will tap water do the trick?

I'm not sure, but I'm guessing it may cause cloudiness. The distilling process takes air out of the water which is why distilled water tastes flat.

I just Googled! "1. Use distilled water. The minerals in tap water can turn brown when exposed to elevated temperatures but because there is so little of these minerals it is perceived as a yellowing effect" http://www.makeyourownmolds.com/isomalt