Quote Originally Posted by rjm2653 View Post
ive heard both sides of the argument, and my tank has been successful with them in it for months so until I start seeing issues, im not separating my animals into 3 tanks.
From my experience in reef keeping. (I am not a frog expert by far) As long as you keep changing the activated carbon once a week, you shouldn't have too much problems with toxins in the water. In small reef tanks carbon prevents the systemic chemical warfare that goes on in a confined, coral packed environment.