Perlite Filter Media vs. D.E. (Diatomaceous earth) Filter Media Part 1 of 2


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So what is Perlite and how can it be used as a substitute for D.E.?

This is from the Perlite Website:

Perlite is not a trade name but a generic term for naturally occurring siliceous rock. The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume.

This expansion is due to the presence of two to six percent combined water in the crude perlite rock. When quickly heated to above 1600°F (871°C), the crude rock pops in a manner similar to popcorn as the combined water vaporizes and creates countless tiny bubbles which account for the amazing light weight and other exceptional physical properties of expanded perlite.

This expansion process also creates one of perlite’s most distinguishing characteristics: its white color. While the crude rock may range from transparent light gray to glossy black, the color of expanded perlite ranges from snowy white to grayish white.

Expanded perlite can be manufactured to weigh as little as 2 pounds per cubic foot making it adaptable for numerous applications.

So does it work as well as D.E.?

Here is part 2 where I take filter apart and you can see how the Perlite held up – the answer is it did an excellent job:

Perlite Filter Media Filter Cleaning & Backwashing Part 2 of 2:

For your specific DE filter type and how to clean see my playlist here:

D.E. Filter cleaning, Backwashing & Tips:

For a video on the filter socket tool –
Multi-Tork Filter Socket Tool – For Faster Filter Cleaning:

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