How often do an adult red eared slider eat?

Your turtle will always be begging for food. Red-Eared sliders have a voracious appetite. Most turtle keepers feed their turtles one good size meal every two days. How much is a good size meal? until your turtle stops eating. Other keepers feed them twice a week. I personally prefer to feed them one small meal everyday. If your turtle is fat (skin overlaps on its legs when she tucks them in), you might want to examine what you are feeding it (if it has too much of a fat content) or you might start feeding it less often.
Adults- Feed your adult R.E.S turtle every other day.

Babies- Feed your baby R.E.S turtle every day.