Hi! I'm a new Betta owner. I have a healthy (or so I hope...) Male half moon Betta fish named Fish (I know so original :P). I'm a college student and wanted to get a pet for the dorm. I think there might be something wrong with Fish though, I woke up the other day and I noticed that he has a few holes in his fins that I haven't seen before. I tried to get a good picture, and the one I did get probably isn't the best.
I keep him in a 2.5 gal tank, with a heater (the temp right now is about 72-73), a live plant, aquarium gems, and a small castle that he loves to swim in and out of. I do weekly 100% water changes on Wednesdays. I feed him every morning when I wake up or when I get back from class. He seems to be healthy, he eats and swims and flares his fins every now and then. He likes to hang out by his heater, probably because the water is a bit chilly for him.
Could these holes be fin rot? If they are can I get medicine from PetCo?
I know it's hard to tell, but the holes are those white circle/spaces on his fins...should I be worried?