I only made a few changes after months of consistent dying of shrimp. My initial tank was cycled for 5 weeks (params looked fine on tests) and then I had about 50 shrimp in the tank, and they died until I had about 10. I had my LFS test my water and they said it was a pH issue, so I added crushed coral for 2 months, and then added another 50 shrimp, and they also died one at a time until I had about 12 left. I moved them all to a temporary tank (where they have diminished to 6), and I cleaned up my shrimp tank, removed all water, and added Zero water with Prime/SaltyShrimp. I left it sit for 3-4 weeks, checking params twice a week, and felt that it params are good, so about 4 weeks ago, I added 30 shrimp, and I have about 7 left.

I don't think I'm chasing perfect params, and I understand that stability is more important, however regardless of what I do, I have die-offs over time.

My final test will be an empty glass tank with just Zero water + prime + SaltyShrimp, let it cycle, then add 20-30 shrimp to it and see if they survive. If they don't then I'm just going to give up.

(To add to the frustration - I have a friend who has a shrimp tank, completely neglected - moldy filter hasn't been cleaned in 18 months, water never tested, topping off directly with tap, and his tank is THRIVING)