I've had Tiger (my betta fish) for almost 5 months. So far tiger has been doing GREAT! Until a couple days ago, he sits on the countertop next to another aquarium that has my pink african clawed frog in it. I switched the tanks around because the frog likes it darker. Once I had switched the tanks around Tiger acted all upset and depressed. He wouldn't eat, he wouldn't swim around and all he would do is sit in his cave he has. 100% of the time he would swim up as soon as you were getting ready to feed him and he would follow your finger and now he won't do anything! I switched them back around, but he still acted the same way.
This has been going on for 2 days, but today I had to move him to another room due to painting that will be going on in the room he is housed. He still won't eat and he still won't do anything. He just sits in the bottom acting all depressed. But today I saw a red lining around his eye. No clue what it is, have never seen it before. He was also hitting the pebbles at the bottom of the tank and they only time he swims around is when he is mad and he has his gills out in attack mode. I was reading on the web, at first I thought he was depressed (which still could be the case) but then I saw this red lining around his eye and it is really freaking me out because I'm thinking he has everything in the book.
I uploaded pictures to show the redness around his eye, some of them didn't come out too well especially since the lighting is so poor but you can tell the difference how one eye is fine and the other one is all red.
Any advice would be great! Thank you!