all my snails are doing great. here is what i have. 75 lbs fiji lr, sand bottom, pencil urchin, purple tip urchin. blue leg hermitsabout10-15, 4 feather dusters. 3 peppermint shrimp. 1 sally lightfoot crab a serpent starfish, 5 turbo snails. purple sea slug, flame angel, mandarin, 4 damsels from cycling that are still in the tank, and a flame scallop. i got the tank at the end of oct and finished cycling the end of nov. i got the mandarin first and he has done very well eventhough i was told after i bought him not to add him until after the tank is well established. its a 90 gallon tank. my flame angel seems to have tail rot or the damsels are picking apart his tail. he has almost none left. what should i do about that? i dont have a quarentine tank.