I've been dealing with issue with my Betta's tail fin for a few weeks now. It will look like it's starting to heal and then I'll come home from work and it's a torn up again.
This week I added a light to my tank and was able to finally get a good look at his fin and noticed the ends looked black.
I did a 40-50% water change and that night. The next day when I got home from work the fin was badly frayed again and I could still see black on the tips of the fray.:
I did another 40-50% water change that night, this time with aquarium salt and have been doing one every day for the past couple of days with aquarium salt.
He is in 10 gallon tank. The PH is probably a little high about 7.4 ppm, but the ammonia and nitrite are 0 ppm, and the nitrate is 20 ppm. Before this week I was doing 1-2 40-50% water changes a week and the water parameters are also at about these levels. Temperature is 79-82 deg. F
I don't know if you tell just from pictures alone but do you think my issues have been from fin rot all along or from something in the tank. I'm using all sink plants have checked all my decorations with a pantyhose and they seemed pretty good, although I've yet to find anything that doesn't have at least one spot the briefly catches the pantyhose. The issues seemed to first start a few weeks ago when I added a new hob filter to the tank and I thought it was because the flow was to strong even at the lowest setting so I covered the outake with a sponge (the intake was already covered with a sponge) but while I did see some improvements at first it got bad again.
Besides the appearance of the fins he seems to be perfectly healthy, very active and has a great appetite. Haven't had bubble nest in a week or so but was still getting them when the tail was bad.
Should I just keep on doing water changes every 1-2 days with salt until it fully heals or should I add some other kind of medication to the tank? Should I be doing bigger water changes than 40-50%?
Thanks for your help.