Did I say not to test anything else? You do realize the OP can't read your mind, right?
As I said in my original post if there is not an ammonia source what is there to cycle? If the tank is cycled it should be able to process the ammonia produced by the shrimp, and it would not "pollute" the tank. Putting a whole dead shrimp in there is adding a huge bioload which is many times the load you'd put on the system by adding one small live fish. Depending on the amount of denitrifying bacteria present in the rock, it could do anything from handling it, though probably with an ammonia spike, to crashing it and starting a whole new hard cycle. That's why you add one fish at a time to a cycled tank, to allow the bacteria to catch up and build higher populations. Why risk life on the expensive LR?
The reason I wrote what you highlighted is that I know form experience that just because your tests show every thing is good things do not always go well for a myriad of reasons that you obviously don't understand, I sure don't understand why you'd randomly tell someone to let his tank go fallow for one to two months because a fish died. but you have more posts than I do so I must bow to your superior knowledge and experience.
And to the OP you in no way started an argument, Angel*Fish jumping to convulsions did.:wavehand: