I just recently thought I would try my hand at the ole clay pot cave that I hear all the rave about 
Anyway, when I put it in the tank it almost seems to release this string of tiny bubbles or maybe it's clay I dunno but it bubbles out the top it looks like. I did wash it after I broke and sanded the pot. I'm just not sure if this is normal, like maybe oxygen bubbles just working it's way into the cracks, or what. Right now I just left it sitting in a tank that's not in use. Just transferred the fish out of a 5 gallon.
Any ideas?
Anyway, when I put it in the tank it almost seems to release this string of tiny bubbles or maybe it's clay I dunno but it bubbles out the top it looks like. I did wash it after I broke and sanded the pot. I'm just not sure if this is normal, like maybe oxygen bubbles just working it's way into the cracks, or what. Right now I just left it sitting in a tank that's not in use. Just transferred the fish out of a 5 gallon.
Any ideas?