Just wanted to share my little discovery. Over the weekend I placed a couple of terra cotta saucers (about 3" dia) in one of my tanks with the idea of placing some sphagnum moss in them for extra humidity. First I washed them so they were still wet when I put them in. I never had a chance to put any moss in them because the humidity shot right up (too high in fact). So to make a long story short, damp terra cotta soaks up water very well and releases it slowly adding humidity. Has anyone else noticed this? Many people use terra cotta for hides so I imagine that it is safe to do this right?