sick turtles?

Question
QUESTION: Hello, I have two small painted turtles.  They both have a "film" on their extremities.  It is not on their shells and the shells appear to be fine.  I have been keeping an eye on it for the past few days and this "film" seems to come off eventually in the water.  Their habits have not seemed to change; they are still eating, swimming, and basking like normal.  After looking on the internet about this, I wondered if they had shell rot, but I'm not sure.  I don't want to treat them for the wrong thing.  Thanks for any help you can give.

ANSWER: Hello this sounds to be a fungus. What is the housing like for them? What are the temps?
You can google salt to use for fungus with turtles/

---------- FOLLOW-UP ----------

QUESTION: Thank you for getting back to me.  I have about a 55 gallon tank.  I keep it about 1/2 to 2/3 full.  I have a place for them to come completely out of the water with an ExoTerra 60W Daylight lamp that is kept on for about 9-10 hours.  I have the heater set at 76 degrees.  I clean the tank about once a month as it doesn't get very dirty.  Should I be cleaning it or at least adding new water more often?  After looking more on the internet, could this possibly be shedding?  Please let me know if I should be doing anything differently or if I need something else for the tank.  Again, thank you very much!

Answer
Hi thanks for the prompt reply. They can get a fungus and it not effect the daily activity. It is normal that they continue on unless it is bad.  You can read more here
http://www.ehow.com/how_5370443_clean-off-baby-turtle-fungus.html

Please let me know if I can assist anymore. Best of luck!