I have two Axolotls, and a while ago (I don't exactly remember, but it's been over four months), I noticed one of them floating, just touching the surface. He seemed unable to touch the bottom of the tank. I did some research on this issue and I lowered the tank water so he could touch the ground. I left this for a few days and filled the tank back up again. The axolotl was fine. Couple of days after, it happens again. I repeated the process, but he just kept on floating back up. This went on for quite a while. I called up the fish store where I bought my axolotls from, and they told me to put in a teaspoon of salt. I did, and this worked for about two days. He started floating again, and now its getting worse. He was struggling very much to touch the tank floor. I lowered the water again and now I keep it just above them. Its been like this for days and he has still been touching the surface. I've caught him a couple of times floating upside down. This greatly concerned me. I've read about other people having the same issue with their axolotls, and I read about certain techniques to stop it. I'm too afraid to put my axolotl in a refrigerated container, as I've heard can help, because I have never done this before and I have very little information on exactly how. People have said that the problem could be that my axolotl has been gulping air from the surface, but I don't think so, because I have never seen him do this. I don't think he is very healthy. I feed him and the other one once a day on small little dried tablet things (I think they are called 'Axolotl Chow' or something like that). Should I be feeding them other foods? I feel that I need to get some live food for them... Any suggestions? I'm desperate for help. I am able to post pictures if needed and give a more detailed description.