Hi all! I have a curious and active betta named Watson, who has either fin rot or fin damage! He was in a smaller tank initially and I assumed he got fin rot on his back fin when I let the water go a little. That was several weeks ago. Still learning. Anyway, he's been upgraded to a 3 gallonwith frequent water changes and his back fin did not seem to get any worse. Just now I was watching him goof off and realized his anal fin was torn (could have sworn it was fine earlier today). He has a filter in his new set up and has been enjoying playing and exploring around it, as well as surfing the current. He also has a vase tank decoration he likes to swim in. He is very exploratory and active! So, from the pictures- is it fin rot or damage? Thanks!!!!