Fin turning black on betta fish?

phoenixpal

Member
I got my betta fish Phoenix around 4 months ago. He was originally in a 2.5gal planted/heated/filtered tank until recently (1 week ago) when I moved him to a new tank which is 10gal planted/heated/filtered. Both tanks kept at 79-81degrees. While he was in the 2.5gal I only did monthly water changes because that’s what I thought I was supposed to do. When I finally switched him over to his new tank and cleaned his old one, the water was pretty murky since it had not been changed in a while. For the 10gal I’m doing 20% water changes weekly and plan on testing water conditions as needed/every month. So far all the parameters for his new tank are normal.

I noticed he was beginning to develop black around the outermost part of his fins about a month ago. It was barely noticeable but now it’s very noticeable.

After looking into fish diseases, I think it’s fin rot but this is my first time experiencing anything like this (i’m a first-time fish owner) so I’m not sure. I looked up pictures of betta fin rot on the internet but none of them really look like his.

I was planning on getting him a hospital tank (5gal heated/filtered so the biology of my main tank isn’t disrupted) to treat him for fin rot, using aquarium salt and stress coat. But I don’t want to stress him out by moving him into yet another tank AND treat him for a disease he may not have.

I would really appreciate help on trying to figure out what is causing this, I don’t want to leave something untreated or stress him out.
 
  • Thread Starter

phoenixpal

Member
Here are some other pictures of him (from today). The lighting in the second pic of the original post was a bit misleading in his color change due to the light.
 

Salem

Member
Not finrot, just colour changing. He likely has a bit of marbling in his family history.

There may be a bit of rot by the looks of his more ragged looking back but nothing serious. Keeping up with normal water changes should take care of it.
 
  • Thread Starter

phoenixpal

Member
Salem said:
Not finrot, just colour changing. He likely has a bit of marbling in his family history.

There may be a bit of rot by the looks of his more ragged looking back but nothing serious. Keeping up with normal water changes should take care of it.
Thank you! I was worried. I will definitely keep up the water changes. Have a great day
 

Finatic005

Member
Definitely marbling. Just here to reassure lol
 

Most photos, videos and links are disabled if you are not logged in.

Log in or register to view



Top Bottom