Something is making my RBTA look weird. A few of the tentacles look 'bruised' or nipped/crimped. What's going on? My hunch is the peppermint shrimp. Nitrates: 0 Phosphates: 0.2 Calcium: 420 ppm Temp: 80.0 Salinity: .025 Tank inhabitants: 3 peppermint shrimp, one clownfish (not hosting), and one orange spot goby.