Is it ok to put a little baby frog in a 10-gallon tank with a red-eared slider?
First of all, a 10 gallon tank is too small for a turtle, let
alone a turtle AND a frog! The proper rule of thumb for aquatic
turtles is 10 gallons for every inch of turtle... if you have a 4
inch long turtle, you need at least 40 gallons of water. And second
of all, putting a frog with a slider of any age will mean a fed
turtle. The turtle WILL eat the frog. Don't try it.