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  How to Choose Filter Sponge Density & PPI - A Scientific Guide

  Density and pore size (PPI) are often confused when specifying filter sponge. This article clearly explains sponge density and how to pair it with the right PPI.

  2026/09/13 gaoleshi

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  Filter Sponge PPI & Pore Size Chart - Is Higher PPI Always Better? (GAOLESHI)

  PPI (pores per inch) is the core spec of filter sponge. Which scenario fits PPI 10/15/20/30/45/60? How to choose between 10 PPI and 60 PPI? GAOLESHI, a 15-year foaming manufacturer, provides the PPI chart and selection guide.

  2026/09/13 gaoleshi