We have a Mustard Gas Betta that's been with us for over a year now. Around 6 months ago he started to develop a tumor on his side and his tough as nails butt didn't let it disturb him so I have continued to keep him as healthy as possible. The last week or so I've noticed a big decline. His eyes have started to bulge a bit and he's having noticeable difficulty moving around. Particularly laying on the bottom leaning to that side. Pretty experienced when it comes to fish keeping, not so much when it comes time to stop ones suffering. When is it time to decide he's had enough?
https://www.reddit.com/gallery/1p99u1x
Posted by CraftX83