The orange color isn’t a disease, the flesh of shrimp turns an opaque pink/orange color when they die, so that coloring is just an indicator that they are dead ^^ There is something else that is killing them, can you list all your water parameters (including GH and KH)?
sumtingfishy2234 
The orange color isn’t a disease, the flesh of shrimp turns an opaque pink/orange color when they die, so that coloring is just an indicator that they are dead ^^ There is something else that is killing them, can you list all your water parameters (including GH and KH)?