These classic external canister filters have been proven models for large aquarium sizes up to a volume of 500 US Gal for years. Equipped with large canister volumes and strong pumps, large aquariums are filtered efficiently. Both models are equipped with a practical drain tap in the bottom of the canister for easier use. These canister filters features an integrated Silicon o ring fixed on the pump head for easy and safe closing after cleaning. The classic one chamber design allows for flexible Mechanical, Biological, Carbon & Chemical (MBC) media setup with no bypass of water filtration. These low noise & low power consumption provide peaceful, silent operation, and lower electrical bills.