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How to Choose Filter Sponge Density & PPI - A Scientific Guide
Density (kg/m3) and PPI are the two core parameters of filter foam and they are independent. GaoLeshi explains how each affects compression strength, dirt-holding capacity, pressure drop and filtration accuracy, plus a three-step selection procedure and three common selection mistakes.
2026/09/13 gaoleshi
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Filter Sponge PPI & Pore Size Chart - Is Higher PPI Always Better? (GaoLeshi)
What does PPI mean in filter foam? GaoLeshi explains the PPI definition, how PPI relates to filtration performance, the full PPI-to-pore-size comparison chart (coarse 10-30, medium 40-80, high 90-120) and how to choose the right PPI - and why higher PPI is not always better.
2026/09/13 gaoleshi