This is my first time keeping cherry shrimp. I do have wood and African fan Shrimp in my main tank and have never had an issue. Since buying them last week I've lost over half. The only thing I have noticed is a yellow ring around a couple of shrimp. Ammonia nitrite 0 nitrate 20 kh 8 GH 12 tds 300. The only thing I can think I did wrong was not fully acclimate them properly as I was told I can just float the bag by the shop. Any advice would be great, are my current levels ok for these shrimp and how long after large water changes and stress should I still expect deaths? Thanks all.