ceramics in the tank

[byancey]

I had read somewhere on here that someone put a piece of glazed ceramics in thier tank for thier Clowns to lay eggs on . I have my own ceramic shop and a pair of mated clowns and was wondering if I really read that right or did I imagine it. I know there is dangerous inert ingredients in ceramics that are not handled properly and I was hesitant to take the chance on glazing a piece and having it craze (cracking of the glaze) later. Also I have not seen any research on the effects of salt water on the glazes over a period of time. Any input would be fasinating.

 

[xdave]

Some glazes contain lead nad other harmful elements. Everyone I've known that bred them professionaly used common unglazed flower pots.

 

[milomlo]

I think Bang Guy put a ceramic tile in his tank. Not sure though.

 

[williej]

Found this thread while doing some searching. I am trying to decide if I can a put fired but unglazed ceramic vase with a side broken out of it (like it came from a shipwreck) as a cave/refuge for small fish. Can I use this or would I need to use a food safe glaze on all of the pieces? If I use a glaze, will the corals and such that I hope to have in my tank someday be happy living on it?
Thanks for all the help this site has/will provide me.