My betta has fin rot in my 4 month old tank! Help!

[Bruce Leyland-Jones]

I found a kit on Amazon (we also have Prime). I think I'm going to get that. It comes with hosing, a pump, and an airstone.

Sounds worthy.

Also, as for the temperature, his tank stays at 77.1- 78 degrees fahrenheit consistently. I talked to my mom and she recommended I put the bucket in my grandmother's house. We turned our garage into an apartment when I was little, so she has her own space. The best part, though, is that she keeps the apartment very warm- typically about 80 degrees. So the bucket shouldn't be too cold that he will be very stressed. I expect the water to hover at 70-72 degrees fahrenheit, which is colder than he's used to, but I'll acclimate him going into the bucket, and then again going back into his tank.

It's not about what he's 'used to', it's about what he can live in. Betta are prone to cold and if the water's not warm enough, he'll die and it'll be your fault.
However, there's no real reason the water should be cooler than the rest of the apartment, o it should be okay. Just don't put the bucket in a draught.

As for Zeus (my betta's name), I have Maracyn on the way, so he should be alright. But also, he looks better today for some reason. His ventral fin was shredded looking and clamped to his chest, now about ¾ of the fin is back and there is some clear parts. His tail also looks like it has a bit of a spade shape again. The strange thing is that he essentially healed a tiny bit over last day and a half. I did fast him because also got a bit of bloat, it goes away after a day of fasting. It's also not been happening very often as I soak his pellet before giving it to him.

Did you not do water changes?

 

[Fish Hobbyist]

Sounds worthy.

It's not about what he's 'used to', it's about what he can live in. Betta are prone to cold and if the water's not warm enough, he'll die and it'll be your fault.
However, there's no real reason the water should be cooler than the rest of the apartment, o it should be okay. Just don't put the bucket in a draught.

Did you not do water changes?

I do weekly water changes. And I'm glad this sounds like a fine hospital 'tank'

 

[Bruce Leyland-Jones]

I do weekly water changes. And I'm glad this sounds like a fine hospital 'tank'

When fish are unwell, 'weekly' is not enough.

 

[Fish Hobbyist]

When fish are unwell, 'weekly' is not enough.

I wish I knew this stuff before now. Some of the things I've learned here have really helped me and my Zeus. Thank you