Limestone vs. Sandstone for Kansas Waterfall: pH Myth

Building water garden in central KS. Told not to use limestone (only local stone with sandstone). Asks why, which to choose.

Limestone pH Myth

Limestone raises pH only if heated to hundreds of degrees (calcination). In water, it dissolves negligibly. Kansas limestone is safe—widely used in ponds.

Recommendation

Use whichever stone you prefer aesthetically. Both are fine. Limestone is often cheaper and more available locally.

Don't avoid limestone based on outdated advice.