Fin rot betta
Well, I thought it would go away with time. I rescued a betta from my friend who got it as a wedding gift (horrible people).
His fins were tattered from sitting in a vase of his own crap for an estimated 4 months. I couldn't stand it any more. He is now in a 10g heated plant grow-out tank. He didn't know how to swim at first and I thought it might be a lost cause. But he perked up, started eating his pellets, and dances around the tank quite happily.
Thing is, after about 2 months, no fin regrowth. I'm very worried. Water is clean, aerated, movement is very slow (just a small airstone). What can I do to let the fins grow back?