walnut char aquaponics media

Carbonized wild-grown walnut shells are not easily broken down into smaller pieces: it’s for this reason, along with biochar’s characteristic high porosity and natural resistance to decay, that we expect make it an outstanding grow media in aquaponics systems. Currently there are just 6 fingerling tilapia and 10” of walnut shell char under 2” of river pebbles in our not yet mature aquaponics system.

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