Am I looking at Scutariella japonica here?
https://files.catbox.moe/dr128j.jpg
https://files.catbox.moe/7r52sq.jpg
I noticed that white stuff on them a day after I bought them. Didn't think much of it but now I have 4 shrimp with that stuff. Also had 3 deaths over the past week.

I found this guide http://www.shrimptank.ca/2014/03/white-worms-neocaridina-shrimp-head and it suggests salt water baths..

Anyone dealt with this before?