I moved my betta to a new tank a couple weeks ago, and recently his fins have looked clear at the ends. He had black ends on his fins when I got him so I was cautiously watching the black parts, but today I noticed a small chunk-like part taken out of his fin. Hoping you guys can help me tell if it is fin rot!
He's alone in his tank so it can't be a bite. I recently did a complete water change because I was worried about fin rot. I use chemical balancing stuff and right now he's got bottled water, not tap, in his tank.
If it IS fin rot, how do I fix it? I've seen some arguments online about how you treat fin rot...so I'm confused. Some say medicine, some say just keep changing the water.