Hi, so I went out of town a couple months ago for a month or so and when I came back, my betta's tail was completely shredded. The top of his anal fin is ripped off and the bottom half is split down the middle and just all together Shredded. My first thought (after checking that it wasnt fin rot) was that he had ripped it on one of the ornaments I had in the tank (fluval spec 5 gal) which was a big piece of wood and two of the flowery balls from petco(we sanded them down to make it smooth on the inside). So I readjusted them so it would make it near impossible for him to pinch his fins or tear them on anything. After a couple of weeks of it not getting better I got rid of the decor and replaced them with plants. After a while, algae started getting out of hand so I got a shrimp and a week later I got a snail. Again a couple weeks later, it still didn't get any better so, since it's a fluval spec and it has the troublesome intake, I put some plastic mesh over it because I had heard of other people's bettas getting caught and ripping their fins. It's been another week or so and still nothing. I've checked multiple times for fin rot but I can't see any discoloration of the fins but then again, he's metalic so I cant really tell. It hasnt gotten any better or worse as I can tell so I have no idea what's going on. If anyone can help me figure out what's going on I would really appreciate it.