I got my first aquarium when I was in my teens (20+ years ago?), and as I was thinking about those past tanks I remembered one of the first tank decorations I had gotten, and managed to find it stored out in the garage.
It is a medium size, ceramic, replica of the Sydney Opera House. The date on it says E.P.I 1990.
It is a great size for the 5 gallon I'm currently cycling, and would be a great size as a "cave" for a betta.
It is glazed, but the glaze has cracked in places. There is also a least one good size crack on the bottom, in the ceramic itself, but I don't really consider that a huge problem since the entire bottom of the piece is unglazed.
I was thinking of cleaning it us and putting it in the new tank, but wouldn't want to risk poisoning a fish.
Can anyone think of any reason this item would not be safe to use?