My new betta's tail is fraying. What causes it and how can I treat it?

Question

I got a new betta in January, and I'm starting to notice that his tail is fraying a bit. I'm concerned because I have another betta, and his tail is really frayed too, but I thought that maybe he was always like that. But I definitely know that the new bettas fins were not. I have a heater and the chemicals are fine, and I use melafix fish first aid every time I change the water. The first pic is what he looked like before, the next is what he looks like now, and the third one is my other fish. Pet's info: Fish | Unknown - Fish | Male

Angel Alvarado, LVT · Accepted Answer

Check the strength of the current created by the filter. Bettas do best in very slow moving water. A strong current can actually damage long finnage. Be sure to use a conditioner at each water change. My preferences are Prime, NovAqua, AmQuel Plus, StressZyme or StressCoat. You can find these in the aquarium section of the local Petco. You don't need to use all of them though. A bit of plain aquarium salt (NOT table or Epsom salt) can also aid in healing. Dissolve up to 1 teaspoon of salt per gallon of water and treat for 10-14 days then reassess fin condition.

My new betta's tail is fraying. What causes it and how can I treat it?

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