 yellow tang having problems
i have had this tang for about a year it has been very healthy to this point. now it seems very stressed and it doesnt seem to be able to close its mouth. it does close its mouth for a second every once in a while. it still looks healthy in color and it doesnt seem to be starving although i have not seen it eat in at least 2 weeks. any information is helpful thanks.
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125 gallon glass. 3 10k 250w metal halides, 1 4ft 110w vho actinic. who knows how much live rock. yellow tang, domino, cinnamon clown, percula clown, flame angel,peppermint shrimp, camel shrimp, skunk shrimp, a few turbo snails, lots of hermit crabs, leather coral, branching frogspawn, mushrooms, too much xenia, and several different zoo's and button polyps | 
