2/22/18 9:55 AM
When troweling the sand or vermiculite pool base, a minimum of thickness of 1½" must be maintained throughout. Spread the vermiculite out with a flat shovel into roughly 2' X 6' sections. Use a 30'' magnesium Darby or 16" pool trowel to spread and flatten the sand/vermiculite. Get the vermiculite as flat, even, and smooth as possible while spreading the material in several directions.