Very slowly Kelly.I add 1/4 cup to 1/2 cup of water every 15 minutes. The
last group of 4 I acclimated over the course of an hour.

I have done some more research on this and I have a possible explanation. I
have an RO/DI unit that the DI cartridges quit on the last water change I
did. I think because of this I have some metals (possibly copper too) in the
tank. I have to wait to get a copper test kit to confirm.

Weird thing is I have 2 Emerald crabs that seem to be fine and of course the
LR is also fine. I talked to a LFS and they seem to think I have some trace
copper and recommended I put a poly-filter in place to clean anything that
the RO/DI may have produced.

"Kelly" wrote in message
news:NXVfc.141557$Ig.46271@pd7tw2no...
How are you acclimating them?


"John D. Maag" wrote in message
. com...
I have a new Aquarium. 75G with Wet Dry. and I just finished my cycle. I
used Fiji Live rock to do the cycle. I have introduced 3 tangs, an royal
gramma and all are doing fine. I also introduced 2 Emerald Crabs and
they
are also fine (though hidden).

The question is I have tried introducing 8 cleaner shrimp and all have
died
with one hour of being in the tank. i would appreciate any knowledge of
what
could be causing this. I have not used copper pipes or any shapre or
form
in
any way associated with this tank. What I have done is used PVC pipe
(and
glue) for the water supply and return from the filter.

Salinity is 35% (I use a salinity meter not Hydrometer)
Ammonia is undetectable
Nitrites are undetectable
Nitrates are 2-3 mg/l