I've gotten fish with a few white spots on them here and there but never any type of outbreak. Within a day or two of being in my display tank they would disappear and never come back. A healthy environment that isn't over crowded has always worked out for my fish to over come ich on their own provided they seem healthy otherwise and are eating well. I have no proof that this in any way helps but I had a dwarf angel that had a couple white spots on it and he would seek out the cleaner shrimp for the first 2 days. On a side note I wouldn't be leaving any fish tank unattended for two weeks. Your fish need to be getting fed properly if they are to overcome ich. Your home insurance also requires someone to check in on your house while you are away. Good luck!
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