A husk-chip band is hydraulic. 0–15 mm behaves like a coarse pith. 10–25 mm holds structure. 8–15 mm is the overlap that buyers argue about. Dust migrates, clogs drip, and seals a mix that looked chunky in the bag.
The husk chips enquire set is those three bands — not a 40-SKU grid. Wash is declared per lot on that page, not enumerated. Chips can carry coastal salt; blending washed pith with unwashed chips breaks the pith COA even if both bags say “coir.”
Name the irrigation system on the enquiry. Growbags fail for the same dust and salt reasons when the chip fraction is unnamed.