Pond Boss Forums POND CONSTRUCTION Creating habitat Creating Smallmouth Beds

TJ, I bet that under water, with no freezing and thawing, limestone will last a whole lot longer than you do. Granite would last longer than that, but I don't think the time differential is nearly what it would be above ground, above the water.

In addition to the price advantage, limestone will also add slightly to the calcium (hardness) content of your pond water, which is a plus.

P.S. I just used native stone, which was probably better than half shale. I'm sure the limestone will outlast that.