MARINE Waste Water Treatment Complies  with ISO 8099 STANDARD Superior Durability: MATROMARINE holding tank systems are molded from linear low density polyethylene (LLDP) resin. Polyethylene is best-suited for holding tank construction because of its resistance to corrosion and odor permeation, and it will last longer than the life of a typical fiberglass hull. ISO/USCG Compliant: [...]