I bought one of these guys about 3 months ago and since I've added it I've lost both my cleaner shrimp, all three peppermints and the blood shrimp has very small antennas now. The CBS looks great, probably 10" antennas. One small clown has a ripped tail fin and one of my anthias has a lot of fin damage. Another culprit may be a 4-line wrasse added at about the same time. What is your experience with these shrimp?