Some people say it's safe if covered in varnish; other's say it's safe if not covered in varish. I agree with the second opinion. I think it would be okay to leave the baked clay without varnish or to cover it in aquarium silicon.
This person claims that it's fine in their pond, but I worry about the clay decomposing over time. Putting polymer clay scuba diver in the fish pond
I really need to make bases for these silk plants I'm making for my future bettas. Rocks wouldn't work, since I drilling holes all the time is too much of a hassle. I considered using plastic pop, milk, and water jug lids, but I don't think they would weigh enough to stay anchored under sand.
This person claims that it's fine in their pond, but I worry about the clay decomposing over time. Putting polymer clay scuba diver in the fish pond
I really need to make bases for these silk plants I'm making for my future bettas. Rocks wouldn't work, since I drilling holes all the time is too much of a hassle. I considered using plastic pop, milk, and water jug lids, but I don't think they would weigh enough to stay anchored under sand.