The water temperature is as important as the ambient room temp and will affect appetite.
What temp do you keep the water at? It should be around 78-80F. The room temp shouldn't drop below 72-75F with a basking spot in the enclosure of at least 88-90F.
Are you providing full spectrum or UVA/UVB lighting?
Plant matter should make up at LEAST 45-50% of a RES diet. What types of veggies have you tried feeding him?
Does he show any other symptoms of possible illness? (cloudy, closed or swollen eyes; swollen
cheeks; open mouth breathing; bubbly mucous around the nose or mouth;
runny stools; loss of appetite; listlessness; spots appearing on plastron
(bottom shell), carapace or body; soft shell or excessive shedding?)
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Christina Borders

