I think I've gotten in over my head with the betta I rescued. Today he seems to have what looks like a tiny sore or wound on his face. I can't tell, he has some kind of weird nature coloring so it may just look like that. His tail seems to be getting thin in other spots and I'm afraid it will split further. There were a few odd string things in the water in his tank, I don't know what it could be. I have been changing the water completely every day. Right now I put him back in the little jar I originally had him in. All I could think to do to sterilize the tank was to fill it up and dump in a bunch of aquarium salt and let it set. Sometimes I feel like I am just making it worse for him due to my ineptitude. I have a terrible time catching him in the net, it scares him really bad. I measure the amounts of salt and stress coat I was told for the water bottles but I'm not 100% certain I get the right amount. His water didn't feel too hot today but there is will be 90+ temps all week here and no AC so I'm afraid he'll get too hot. I don't have money to buy him anything, I live in this tiny little town with one overpriced pet store that doesn't sell much. I don't want to hurt him, I just wanted him to have a better life, I'm really confused and sad about what to do. Its not like he's immediately dying or anything, I think if I was more competent I could save him. He eats, swims around enough I can't get pictures of him because he won't hold still. I'll try to get some detailed pics of what is going on if I can, it might be easier in the small container. Thanks.