I had a happy, fat shrimp for many months until I had an exterminator into the house. They all died, and new ones all croak shortly after being introduced to the tank (I find their little bodies). I've tested water, and had LFS confirm my results-- water is in good shape. Tank is 30 gal lightly planted peaceful community. I have done a number of partial water changes since the exterminator's visit, and have tried with RCS from several LFS's, but same result.
Two Q's, I guess:
1) Any guess why shrimp are dying?
2) Suggestions for how to remedy so I can once again have shrimp tidying my tank?