Fuzzy moldy stuff at bottom of tank

[xShainax]

I suggest you re-home him

[LizzyP]

+1,000. ^

[Alcemistnv]

Even if you don't rehome him, buy a larger tank and get the appropriate items for him, such as a filter, thermometer, etc.

[MoonShadow]

Did you research bettas at all before buying one? If you can't give him a proper home then I also suggest that you rehome him to someone that can. It's completely unfair to him to keep him in conditions that will severely harm his health and possibly kill him

[Homeskillet10788]

Thanks for the suggestion, but I've been keeping bettas for a few years, and one of them even lived 2 and a half years! My little guy isn't lethargic or anything, because I do keep the apartment pretty warm.