@Colin_T I sent him those shrimp. None of mine are dying. How would they get spirinucleus?Have you been doing water changes?
Post pictures of the dead and live shrimp.
Are the shrimp developing cream or white patches in their tail (rear half of their body)?
If yes, they have spironucleus and need treating with salt. Use 2 heaped tablespoons per 20 litres of water. If they continue to die after a couple of days with salt, then double the dose so there is 4 heaped tablespoons per 20 litres.
Keep the salt in the water for 1 month and then water change it out.
It’s just that none of mine are dying. I hate this is happening to you. You’ve had them about a month now, haven’t you?