Dicalite Diatomaceous Earth (D.E.) 25LB Bag - DE 25
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D.E. – The Water Polisher
Diatomaceous Earth — also known as DE, TSS and Diatomite — is a naturally occurring, soft, chalk-like sedimentary rock that is easily crumbled into a fine white to off-white powder, with a particle size extending from less than 1 to over 100 microns, but typically around 2 to 10 microns. This powder has an abrasive feel, similar to pumice powder, and is very light, due to its high porosity. The typical chemical composition of diatomaceous earth is 86% silica, 5% sodium, 3% magnesium and 2% iron.The most common use (68%) of Diatomaceous Earth is as a filter medium, especially for swimming pools. It has a high porosity, because it is composed of microscopically-small, coffin-like, hollow particles.
This widely available, inexpensive powder is mined and is actually the microscopic fossilized exoskeletons of tiny Diatoms, an ancient, sub aquatic creature. Under the microscope, these skeletons appear to be tiny sponges. This is where the dirt gets trapped in your filter. The powder, which is added at your skimmer, dissolves in the pipe on its way to the filter tank. When it reaches the grids, which are covered with a nylon type of fabric, the powder stops, coating the grid. Grids are also called Elements or Septums. The water continues to pass through, first through the powder, then the fabric covered grid. As the water passes through the D.E. and enters the grid it leaves the dirt, trapped in the D.E. powder "cake" or coating.
Due to the shipping weight, Dicalite Diatomaceous Earth is available in-store only.