Peppermint shrimp differences

I recently read a post regarding the differences between peppermint shrimp within the past week or so, it discussed the difference in species (one key feature to tell them apart was if they had a black tail or not), now I'm trying to find that post/article again but can't seem to locate it. Did anyone else see this post? I can't recall if it was on here or R2R but I've looked both places and can't find it..



The post discussed the differences between the species, and discussed how some people have problems with peppermint shrimp and that it is likely a certain species, so now that I've looked closer at mine I want to re-read the article!