I don’t have much supporting evidence but I had 2 full grown cleaner shrimp that I had for 6-8months and after dosing vibrant for a few weeks both died. They were in the rocks and just died there. Not eaten by anything. Perfectly intact. The only thing that had changed was dosing vibrant. I did research and found a few other cases of similar instances. I think it’s more on the rare side but be aware it can happen.