I bought a cleaner shrimp a couple days ago because my yellow tang has been scratching on the rocks after I accidentally stirred up the sand bed and made the water cloudy. I have a full reef with lots of coral so I can't treat with copper. I was told to try herbtana in conjunction with either a cleaner shrimp or a neon goby to help the tang. I opted to go with the shrimp because the lfs guy said that the gobies will not eat parasites if they aren't hungry and they will eat regular food. I figured the shrimp would be more likely to do the cleaning since he's a scavenger and wouldn't get as much food as the goby from regular feelings. Unfortunately, my lfs did not warn me that anything in my tank would attack the shrimp and I didn't think it would be an issue since nothing has bothered my hermit crabs. I was wondering if you could help me figure out who the culprit might be. I would like to keep a cleaner shrimp And a coral banded shrimp, but I'm not putting more in if they'll just get eaten. My fish stock is: 2 percula clowns 1 six line wrasse 1 royal gramma 1 yellow tailed blue damsel 1 azure damsel 1 scooter blenny 1 yellow tang 1 diagonal stripe goby (if he lived) Misc zoas and palys Duncan coral Montipora cap Acropora Purple mushroom Green polyps leather coral (don't know what kind) Trumpet coral Gsp Lobo brain coral Green carpet anemone It's a 125 gallon system with a sump.