Yellow-bellied sliders spend most of their time in the water so keeping it warm and clean is a priority. These turtles can be quite messy due to their high protein diet so require quite a strong filter to keep them clean. If you have a powerful filter you should only need to check it once a fortnight and clean the entire enclosure once every 3 months or so. Water should always be treated before being introduced to the turtle’s enclosure to remove the chlorine. If you do not do this trace elements in the tap water can disturb the biological pads in your filter and even effect your pet. A content temperature of 25oC (75-80oF) should be maintained day and night. A water heater can be used to keep the water warm. A general guide to go by is 1W will warm 1L of water.