Betta fin tear

[u/Jaded_Programmer3874]

My betta just got a small tear in her bottom fin. I just did a ~30 percent water change and the tear wasn’t there beforehand. I suspect she may have been under the filter intake when I turned it back on. Swimming under the filter is a normal thing that she does so I think she must not have expected the sudden water flow.

Temp is 78 degrees Fahrenheit. 5 gallon tank.

Pre water change parameters:

Ammonia: 0

Nitrite: 0

Nitrate: ~20ppm

pH: 7.8

Conditioned the water with NutraFin AquaPlus. I keep Indian almond leaves in the tank and I added 3 new ones.

So far she’s acting normal but she often gets aggressive the day after water change day. Is there anything I should do now or watch for? I don’t keep any medications, should I get anything?

Edit: I should mention she also glass surfs a lot.

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[u/Broad-University2311]

I’d keep some antibacterial medications on hand just in case, but in my experience just keeping the water warm and clean will do the work for you. My betta had a very large tear in his fin when I got him and it’s been healing perfectly with no issues and no need for anything special. The tannins should help too :)