Ok here we go !
During this process you will have a week to 10 days to correct there regular tank ! If not problem will just come back !
1) Setup a dry dock tank / container. "Quarantine" tank No water . Keep temps normal for the turtle. Do Not Over Heat the turtle ! Keep the lights on a timer as day/night.
2) Clean turtle's shell with betadine or povidone -iodine or a surgical scrub solution. Let turtle "air" dry in warm setting for about an hour.
3) Now apply thin layer of Silver Sulphadinze cream. It's a "RX" in the US ! Place into quarantine tank / container 18-20 hours each day !
4) During this time once or twice a day remove turtle clean him with say the iodine let dry and place in a clean water supply ( not the problem tank ) so it may rehydrate and you can feed turtle during this process ! Let him swim and drink and eat for an hour or two to assure rehydration ! This is very stressful on a turtle and Must hydrate them !
5)Repeat above ! Clean / cream / dry dock / rehydrate 18-20 hours each day , done for a week to ten days . Do not forget the rehydration steps ! Also watch the quarantine tank temps !
6) All this is for "NOT" if you do not clean / sterilize it's regular home from the living microorganisms that caused the problem. You will have a week to get that done !
7) You must give more time and attention and maintenance to its regular home or this will happen again.
once cured place in regular home.
9) if you feel to much for you a Herp Vet will be happy to do it for a lot of money.
10 ) compare what I say to whats on the forum or internet I am not a vet only doing this for decades. This is to have a happy and healthy
turtle.
Good luck , it works !