Recently, I got a golden albino axolotl, Dante. He's young so we feed him bloodworms. All went well for a few weeks but he soon developed swelling in his throat area. At times, it's been bad enough that he's unable to eat. We tried quarantining him for a little while, then using furan 2 in his tank, and now he's fridged. Are there any further steps we can take to help his recovery- if he even does recover?