Is it time to euthanize?

WARNING!!! Sick fish

Hello all! I think I know what I'm seeing (dropsy) but I want a second opinion before I go ahead and put him to sleep. He's been floating in an isolation tank for a couple weeks now with no signs of improvement, 50% water changes every other day dosed with Prime and Stress Coat.

His blind eye makes it hard for him to find food so I've been feeding him brine shrimp and pellets soaked in tank water every other day. He's been responsive to food but otherwise very minimal activity. Just sitting at the bottom of his tank, sometimes upright and sometimes on his side.

I have a week long business trip coming up the first week of March and if there's truly no hope in saving him, I'd like to put him to rest before then.