Hi I am really sorry about your bettas. I understand. Some of these people over obsees with all these like big tanks. I had a goldfish that lived for 6 years in bowl. My friend had one that lived in a 1/2 gallon bowl for 14 years! So i understand. I have a betta that lives in a 1gallon corner tank for about 2years. So please don't give up on your bettas. Just take care of them. Maybe since you only have 1 you can just take care of that one :)