Hi Wolfen,
Thank you for replying. I tested his water last weekend with the API kit and all the pH, ammonia and Nirite/Nitrate levels were in normal ranges. The exotics vet in Denver tested his water again last Tuesday and said all was great- I have changed 1/3 of his water twice since then. I have a 40 gallon tank with a 50 gallon Fluval filter, an extra airstone bubbler, and a large sponge filter with bubbler as well. His underwater plants have been growing for the last 4 years and he has a big hide as well as two small clay pot halves in his tank. I will do my water test kit again this evening and can give you the test results then, but I don't expect there to be any issues in that department. I have aquatic sand on the bottom of his tank.
He showed signs of a fungal infection a week ago, having never had one before. I don't know if it takes a long time for the infection to "bloom," or whether he could have possibly picked it up from the first exotic vet that I took him to last on May 7? (While there, they injured him, hurt his tail horribly...I don't know if they perhaps used their own water when weighing him/doing x-rays)? He had the watermold infection showing up as small tufts on his gills. They are no longer there, but we are on day 5 of the salt baths. The salt baths (as prescribed by the second exotics vet in Denver on May 13) are done every day for 15 minutes, with 20g/l of non-iodised salt.
I clean his tank every weekend. I use a gravel vac and vac out the bottom of the tank, inside the hides, and whatever I can get from shaking his plants. I usually end up taking out about 6-7 gallons and replacing with clean water. I use the axolotl conditioner by Seachem. In the past, I have used Prime with water changes. I also clean out his sponge filter and the Fluval. If I have to change anything in the Fluval (charcoal, substrate or sponge) I only do it one portion at a time and usually that seems to occur every few months.
I feed him earthworms (small or halves) from a bait store. I rinse them first and dangle them in front of him with tongs until he strikes. I do not leave food in his tank. I usually offer food every 2-3 days, when he lounges in the front of the tank and watches for me.
The other symptoms have been lethargy, floating near the top of the tank (unusual for him), and swimming up to the tank to take a gulp of air. (?) He has not shown the lethargy or the top floating since his return after the second vet visit on the 13th. He is putting up with the medicated baths for the tail injury and the salt baths for the fungal infection, but he is not a fan. I'm sure I wouldn't want to eat with all of this stress, either, but it has been two weeks. He just doesn't look right, isn't acting like himself, and I don't know if I can afford to keep taking time off and paying the exotic animal vet that is over an hour away. I appreciate your advice! Thank you!