So I’m just writing to see if anyone has conquered this problem. So I have a 20 gal long, every time I put a cleaner shrimp in there they develop black spots on them and then eventually die. I put one that was in my 40b to help with clean up then he developed black spots, then started looking crippled. He looked like he was gonna die so I moved him back and it’s fine now . I put a new shrimp in my 20 last week an this week he had black spot. He molted yesterday and now he’s lookin a little broken down. Help
his tentacles are messed up and eventually they start to deteriorate physically.


