In order to create and maintain a clean, healthy aquatic environment, three stages of filtration are required: mechanical, chemical and biological.

Aquarium water is drawn into the canister and through a succession of stacked media trays for full-contact filtration -- virtually no bypass.

The water is then returned to your aquarium, sparkling-clean and fish-healthy.

And when it’s time to service your canister filter, all you do is push a lever, turn the key, and lift out the easy-access media trays.

The Mechanical Filtration Polishing Filter Pads part in this is to screen out fine particulate dirt and debris.