My betta's tail looks like its fraying. I'm not sure if its fin rot or if his tail got sucked into the filter. He likes to swim under it a lot. I did treat him with bettafix which was a huge mistake. It looks worse now. I'm sad to say he is currently in a 1.5 gallon tank. I'm new to bettas and saw the reviews on petco and petsmart for the tank and looked like it was perfect for bettas. After buying it, I realized they should be in at least 3-5 gallons. So please don't go off on me for that, I'm looking for a new tank for him. There is a filter and the temp is at 76 degrees. I don't have a heater in since its summer and I live in Texas. But maybe I should. I do a 20% water change and a total clean out of the tank every week. His plants are all silk and the decors are not sharp at all.
Here are some pictures of it:
Oh I should mention that he acts normal. He's just as active as he was.
He's constantly swimming around and is very eager to eat.
Like whenever I grab the food bottle, he gets really excited like he knows thats where the food is.
He waits at the top of the tank waiting for the food to drop down.
I'm really freaking out about his tail D: Any advice will help!~