I have a paludarium-type setup, using lava rock. Because it is so porous, the rock tends to wick up water and stay damp. I've recently noticed a bunch of white specks (it almost looks like my rocks have ich ) on some ov the rocks, especially in the damper areas. Is this a fungus? If so, what should I treat it with? It is only present in areas above the water line, so I was considering using hydrogen peroxide as a spot treatment, but that wouldn't stop it from coming back. Any ideas?