I don't think this really ties into my problem but a little back story never hurts to explain:
I recently took my betta, Moe and his 3 gallon tank, home with me on a 12 hour car ride home, yeah it sucked. He seemed just fine when I got him in this tank at home. It's not in direct sunlight and the room temperature is perfect for the water temperature preferred for bettas and he seems content like always.
So it's been about a week since Moe's car ride here, I fed him in the morning like always, I come seem him again after 2 or 3 hours and...AH! His poor tail fin is shredded to bits! I have no clue how he did this since he hasn't had this problem before! Is this a sign of stress or something? I don't think he could of caught his fin in the filter, is that possible? Theres no sharp edges to any of his accessories and nothing it could of been caught in. I just want to know what could cause this so it never happens again! I don't know if its painful for him or not, but it looks like someone took a huge bite out of his gorgeous tail and I wince every time I see it! :(