hi evryone..i have a 6inch FH with a good size water kok..he was fine til about 2 days ago..i noticed that there is a patch of discoloured skin somewher in th middle of his kok ..its light in color when u compare it to the surrounding skin and its become wrinkled and kok size has shrunk a bit as well..im really worried its some kind of disease..he's as active as ever though and eats as much as he used to and theres no white poop so im optimistic..any idea wat the prob could be..thanks a lot