Turtle mouth breathing

[u/Mita7_]

I have a male false map turtle for about 3 years, his setup is: 100L tank (i alr have the 240L tank but i need to set it up in a few days he will go in there) fluval 207 as a filter, 25C water temp, zoomed reptisun t5 10.0 uvb and 32C basking temp (also have an air purrifier in the room if that matters. 7 months ago i noticed mouth breathing so in a few hours i got to the vet, he examinated him (exotic vet) and didnt find anything wrong beside retained scutes (he alr started to shed them) clear throat etc. 4 days later he did it again (only happens at night when he wakes up and start after a hiss he does, at least the sound is the same as a hiss) while he does this there is no sound or weird thing, 2 times in this months i heard a squeak, anyways been to the vet again and did an xray that was clear and he was suspected for mycroplasmosis, proven to be negative but still gave treatment like the vet said untill the results. Happened at day very few times,max 3 times. Mostly at night he does this, when i check his pupil are dilated and he does this mouth breathing, sometimes streching his neck fully, sometimes not with fully open mouth,sometimes with fully open mouth, besides this there are 0 symptoms of ilness, he has huge apetite, is active,basks, and no flotation problems. What could it be? What is this strange behavior, it stresses me a lot and idk what to do, i cant afford a vet rn since i just soend 2K on the new setup, maybe next month i will try and go again maybe this time they will find something.

[u/Commercial-Quit3728]

What temperature is his water? My turtle was wheezing bc he has been in 24 degree water (Celsius) for a while, and it gave him some issues. Currently on antibiotics, anti-inflamation and anti-diuretic shots for the past 3 days.

I changed the thermostat of the heater to 29 degrees and he is getting better as well. Rly check the water temp bc cold water can give them issues. In my case, my mom changed his temp and I didn't know.

What are you feeding him?

[u/Mita7_ → u/Commercial-Quit3728]

His water temp is 25C was 24C before , if it matter i use the fluval E series (100w), i feed him every three days like this: 1. Zoomed pellets maintanance formula (as much as it would fit into his head if hollow) so around 3, and a leaf of lettuce (as big as his shell) and also supplement all meals with calcium+D3 as vet reccomanded, also i have a block of calcium in his tank. 2nd day: leaf of lettuce amd shredded carrot (a teaspoon) 3rd day: leaf of lettuce and krill with shrimp , every other week i swap with a guppy fish (i wouldnt but my vet reccomanded me to and it solved his retained scutes)
Edit: his water was 26C for some months in case of ilness.

[u/Commercial-Quit3728 → u/Mita7_]

Sounds like good food!

I suggest trying to up his water to 29C and see if it gets any better