So, I have posted several threads trying to determine what is wrong with my betta's fins. At first it looked like he had just cut it on something and several cuts even healed up. But, I'm afraid it's getting worse. The cuts aren't super deep but instead of just being on top of his fin I've started noticing around the entire fin. I'm was hoping it would heal with time but today I noticed the edges of the fin are -slightly- black. I'm almost positive he has fin rot as this point as the cuts have started appearing all around the fin, turning slightly black at the tips of the cuts, and he's been staying at the bottom of the tank a lot more recently. The tank is five gallons and has been running for 2-3 months now. Ammonia is 0ppm, Nitrite also 0ppm, Nitrate is 20 ppm. I just did a 20% water change and vacuumed the gravel. I also added 3 Indian almond leaves yesterday. Should I just start doing water changes every 2-3 days and wait? I've also heard about doing "salt baths"? Any advice is helpful.