If I scrap up alot of oyster shells and dump them in my pond over time, what type of fish (if any) will use these. My friends and I have oyster roasts every once in awhile and I was thinking about keeping the shells for the pond. Is it worth doing? Should I just throw them in a shollow area for best results?

Most of the value of returning oyster shells back to the ocean, is that young oysters attach to the shells and it helps oysters get a foot hold.

The value of putting them in your pond is limited. They may provided some habitat for invertebrates, such as crayfish and areas for macrophytes to attach. If you swim in the pond, be careful, oyster shells can be sharp on a swimmer's foot.

No swimming here. I may put them in for the crayfish that I plan to stock in a couple months. Thanks

bigger rock piles are alot better for crawfish.. Honestly i cant see much benefits from it but i also dont see any consequences from it so do what you want

Like limestone they are good for many inverts and other forage species. I would put them in piles with some rocks (mixed) in water less than 8 feet and where they will not be silted over..

I think I will mix some rocks with them. Does the size of the rock matter much? I'd prefer a larger (pond pebble) over the smaller river and pea pebbles as I figure the gaps between the rocks would be larger. I can get the pea pebbles a little cheaper though

The bigger the better (more spaces between the rocks). The spaces will fill with organic material - bigger spaces take longer to fill. I'd use rip-rap (8"-12") rocks for good crevaces for invertebrates to hide in.

That's a good idea. I'll have to find a local place that sells rip-rap

From golf ball to basketball size rocks would be best. Not sure how well pea size would work.

Yeah, the pebbles are out the window. I'm looking for ROCKS now!