Awesome. Will check out green machine! Thx for the help guys! This is my invinceable fish....who has survived it all! She's doing fine, so I'm sure it's coloring. You all really helped me feel better! Thanks. Hey, any idea why this same fish used to be the tank " mommy" (hanging with the smaller angels and defending them against attackers), and now she's the bully. I had to put her back in a 30g by herself, cause she wasn't just pecking the other fish in the 55g, she was hunting them down! Does she just like being alone? Oh....she seems to only go after other angels. Diff breeds are safe.