Harborlite 900 Filter Media, 25 lb.

Harborlite perlite is an innovative filtration solution derived from a unique amorphous mineral, specifically fused sodium, potassium, and aluminum silicate. In its natural state, perlite is a dense, glassy rock formed from volcanic activity. When processed under controlled conditions, this mineral expands significantly—up to 20 times its original volume—creating a highly effective filter media that excels in solid/liquid separation applications. 25 lb bag.

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