I noticed one of my shrimp also have this. Although it seems we might be getting the parasites' name wrong as it might be Cladogonium ogishimae instead of Ellobiopsidae. This article explains it well.
https://aquariumbreeder.com/ellobiopsidae-or-cladogonium-ogishimae-green-fungus-in-shrimp-tank/
That said, if it is the Cladogonium ogishimae as the previous link makes me think it is, then I plan to do a one, two punch. Let me explain why.
1. The growth on the bottom of the shrimp makes it hard for them to maneuver and eat plus it probably doesn't feel good either. This over time wears them out and helps to kill them.
2. The root of the parasite is past the shell and is sucking nutrients from the shrimp preventing them from healing and becoming healthy
So what is the one two punch? (1) Salt bath and (2) shrimp food soaked in ich solution, dried out, fed to the shrimp.
Why these two methods? It seems that a salt bath kill off the green growth allowing the shrimp to move around again and begin to heal, but doesn't seem to kill off the whole parasite. The part under the shell. Since that part is stealing nutrients I am going through the shrimps gut to get to it.
Why do I think they will work? First I am not totally sure they will that is why I am going to test it on the infected shrimp I have but here are my sources that lead me to believe this will work
Examples of the Ich solution soak:
1) See the first link (above) and read at the bottom of the article
2) Link to video check at minute 3:17.
Examples about the salt bath:
1) https://www.plantedtank.net/threads/how-i-cured-green-gungus-ellobiopsidae-neocaridina-parasite.1248321/
2) Link to video and shows the result (shows the effectiveness but not the medicinal ratio)
What if none of this works? Then I will try the Methylene blue method.
1) https://amateurshrimper.blogspot.com/2019/08/cladogonium-ogishimae-commonly-known-as.html
I will let you know my results. Wish me luck!