I agree on the fact that Amazonia needs to cycle for a while. Both my friend and I set up new Amazonia tanks at the same time. I have no deaths and I plopped my shrimp in after 30 days. On the other hand, my friend lost every single one of his shrimp...all 12 CRS. I still cannot determine what the issue is and I used all my test kits to check. The parameters look great in his tank but all the shrimp keep dying. So yeah, everyone's experiences will be different but I would suggest that you cycle your tank for a while....or throw in some test shrimp for 2 weeks.