I have a male betta who seems to be acting fine (active, good eater, handsome, and productive--patrolling and building nests) but lately his fins have been looking more and more tattered on their ends.
He live in a 5 gal, with a small tom filter, no friends, 79 degrees, eats pellets, 90% water changes once a week.
I have him in a quarantine tank right now (0.5 g) and according to directions I found on another site, I've been adding 1/2 tsp of aquarium salt and doing 100% water changes daily for about a week.
I'm not seeing any changes -- and I feel sorry for him in that little QT -- so I thought I'd ask: do these pics look like fin rot to you? do you see anything in the tank that's not good for him? does treatment i'm doing sound appropriate?
Thanks so much for your help!