Not really sure where to post this. I love the old ceramic ornaments that used to be around before resin ornaments came on the shelves. Is there any problem with the old ceramic ornaments leeching lead into the water or something? I have read some possible issues. I have some that I used in my tanks many years ago and would like to use them again, but am worried about leeching. The ornaments are glazed ceramic in good condition. What do you think?