Terracotta In The Aquarium?

[fattikins]

I was wondering if I could put one of those miniature terracotta pots in my aquarium. I have seen it done before, but is it safe? Which kind should I look for? (Glazed, unglazed, etc). I would like to use it as a refuge for some ghost shrimp.

 

[squeakytoy]

I have jsut starteed using a few clay pots (unfinished, unglazed and non-painted) and they seem to be working just fine. I have a really deep tank and I cant get my hands within 6 inches of the tank bottom, so I needed some way to plant the tank. If you look at the video of my tank inhabitants, around the one minute mark, you can see the pots.