Can’t keep Cleaner Shrimp alive

[Trek2]

I have a 6+ year old established 100+ gal reef tank. I successfully kept a pair of Cleaner Shrimp for several years until they both died within about 1 month of each other, this was several years ago. Ever since then, I have had no luck keeping Cleaner Shrimp. They last anywhere from days to months then die. Is there a specific condition that I should be looking for that Cleaner Shrimp are sensitive to?
I have checked and rechecked all my tank levels and everything is where it should be. Based on the health and condition of the rest of my tank this seems to be the case. I current have a Coral Banded Shrimp (1+ years), Peppermint Shrimp and Fire Shrimp that are all doing fine. They all seem to molt regularly. I also have a host of other corals, fish and invertebrates that all seems to be doing fine.
I have tried getting Cleaner Shrimp from multiple different places to rule out any problems with the source, but keep having the same results. I did have someone from the LPS tell me to add supplemental iodine to help with Cleaner Shrimp, but that turned out to be a disaster. High iodine levels caused a serious algae problem. I abandoned that approach and now have the algae problem back under control.
I’m thinking of requesting a detailed water analysis from my local water company to see if there is something that might be causing a problem, but if there was, why would it only affect Cleaner Shrimp?
Any help or suggestions would be greatly appreciated.
I regularly measure for:
PH
Salinity
Nitrite
Phosphate
Calcium
Nitrate

[bguile]

I'd try removing the coral banded shrimp to another tank then see how they do. I had 3 fire shrimp that I added to a tank to only find them dead a few days later. I couldn't figure out why until I later saw the coral banded a couple days later wounded from battle. He lost the back half of his body and one claw.

[Original Fin]

From what I remember reading about reef shrimp, you don't want to mix and match. CBS's are a 1 per tank species.
Having said that, you'd think if fighting was the reason you keep losing them, that it would be obvious from damage inflicted upon them, so that may not be it at all.

[bguile]

I'm not sure I'd use the other shrimp to judge. Fire and peppermint shrimp are more reclusive than Cleaner shrimp so they may just be able to coexist with the CBS by staying out of it's way. I've also been able to keep Fire and Cleaner shrimp in the same tank with no problems.

[Trek2]

Thanks for the reply’s, I have considered aggressive Coral Banded Shrimp or fish but I’m finding the dead shrimp whole with no visible damage. I have had an aggressive Arrow Crab in the past and found him snacking on my new Cleaner Shrimp like it was a Corndog, but he's gone now. I could be wrong but I don`t think anything else is bothering them. Also my CBS is small and only has one claw at the moment.

[Jessie Nicoletti]

i have a fire shrimp coral banded shrimp annd cleaner shrimp in my tank while i do agree you shouldnt keep multible coral banded if you obtain them as a pair its ok. as far as them fighting ive never seen it happen.

i sugest you ask your lfs to order some and then look at them when they come in dont go for the scrawniest one you see but dont go for the biggest one either. look for long anteni and full legs and also one that DOSE NOT WANT TO BE CAUGHT. chances are he is healthyer then the rest if posible see if your lfs will seperate that one and keep it for a few days in a seperate tank and observe it make sure he is still healthy. if he is get him.

[Jessie Nicoletti]

Also my CBS is small and only has one claw at the moment.

the claws are more of a display thing between cbs for teritorial reasons they are very weak claws

[Kmoriarty]

Since they are living anywhere from a few weeks to a few months, you can probable rule out acclimation problems. I'm assuming you are doing a longer drip acclimation for them right? I wouldn't give up on the iodine though if you're keeping cleaners, they need it! i have 2 medium sized cleaners that i've had for about 2 months now, and i just do half the recommended iodine dosage. They've been successfully molting once every 2-3 weeks. Doing half the dose i haven't had an algal problems. Good luck! i love cleaner shrimp so i wish the best for you!