Not asking advice for the depression, just for how to cope with the tank maintenance.Hello; Don't know how to address depression on a discussion forum. So, won't try. Since rehoming is not off the table, such seems the thing to do. Same for a dog, cat or any other animals under your care.
If or when you find work, then you can try again depressed or not. I have had to cut back my active tanks a time or two and start over later. Good luck.
As far as work goes, I have a job, it's just a horrible job that's chipping away at me and breaking me down. I need to find a new one. The issue isn't a lack of income per say. I have the funds to feed them, get the things they need. It's the lack of energy, the lack of mental capacity to handle day to day life.
I'm going to try some of the advice given, and see how it goes for a few weeks. If I can't get my head in the game, I'll definitely rehome them.