Peef are you sure you have peppermints and not a camelback?
the thing is harmless peppermints are OFTEN mistaken for camelbacks which are not reef safe. they are very similar shrimp. i have never seen or heard of peppermints actually causing problems.
peppermint:
camelback
whats funny about this camelback picture, is the name of the file. it came from a website describing it as a peppermint! right click it and select properties and look at the file name...
just another example of how common this mistake is.