The AST Airlift 10CF filter is designed for fish tanks between 2000-4000 gallons. It uses an airlift system for filtration that is more energy efficient than pumps, with savings of up to 60% compared to pump systems. The filter provides both mechanical and biological filtration through its PolyGeyser technology, which pneumatically backwashes the media and removes concentrated sludge with extremely low water loss.