Just as the title says, I was wondering if anyone has ever used a natural sponge to supplement humidity in a tank. I have a humidifier and regularly use sphagnum moss to boost humidity for winter sheds (I’m not currently having any problems) My wife asked if I ever tried a sponge, I’m going to give it a try, I wonder if it would make a good substitute from the moss? Again just wondering if anyone ever has tied this.