Non toxic pond glue

[xenbones]

Hello there. My question is this: I want to glue down some of the rocks that I am using for "pond-scaping" my plastic pond, but not only do I have fish, but someone in my neighborhood is keeping bees, and they come to water at my pond. I do not want to take any chances with a product. I want to keep both fish and bees healthy and happy. Can someone recommend a good, safe product that will not break the bank?

 

[poconojoe]

There is a black pond foam sealer some people use around their waterfalls. I don't have any experience with it and can't quote a product name. Hopefully someone will chime in and give you some suggestions.
Do a search online for foam pond sealer.