Will I be able to add 3 (or 4?) sexy shrimp and 1 cleaner shrimp? My Parameters are always steady at Ammonia-0 Nitrites-0 Nitrates-0 PH-8.2 (Don't have phosphate or calcium). My current fish and inverts are in my signature.
I had it the other way around. I had 4 cleaner shrimp and 1 sexy all at the same time with no problems. The only thing with sexy shrimp is that they are so small at least with the cleaners you'll get to see them more often, but it can be fun trying to spot the sexy!!
My Pistol Shrimp killed my peppermint shrimp, and their natural prey in the wild are cleaner shrimp. If sexy shrimp hide alot, and like to go in caves, your pistol will most likely make a meal out of them. But this has just been my experience. I do not know alot about Sexy, but I know peppermint like to hide and are rarely seen, and I went from 4 to 1 in 4 days from the pistol I had. I got rid of him, and my last peppermint has been fine.