So today I noticed one of my Pepper Cory catfish has a spilt fin. He seems fine and is acting normal. It is a 55 gallon tank and it's understocked, with no visible signs of bullying. Some websites claim that spilt fins are common and will heal under good water conditions. However, I want to make sure its not something major. I've got 4 other Pepper Cory in there and they have a solid fin. Should I buy some sort of medication or wait it out? What could have caused this?
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