I bought a snowflake/onyx from the live aquaria divers den. I noticed she had a bump on her bottom lip so I put her into quarantine. I tried furan-2 but it kept getting bigger. I kept the temp bellow 77. Then I tried maracyn plus. That made it start to subside. After 3 full 6 day dosing cycles it was almost gone and then it came back. And now it is getting bigger again. She eats like a champ and shows no sign of sickness. Don't know what I should do now. Any help would be appreciated.