Video: Quick test for gypsum products

We've had several calls about last week's video on gypsum vs. calcium sulfate anhydrite from members who want to know how to select the best gypsum products. In this video, we demonstrate a quick test that allows you to compare the rates at which gypsum products dissolve in water, and we also provide some rough guidelines to help distinguish gypsum–based calcium amendment products from those that are based on other materials such as mined calcium sulfate anhydrite.

Video: Gypsum test…