Diagram of a Protein Skimmer

The Venturi Protein Skimmer is used in marine and reef aquariums to physically remove organic waste from the system.
http://www.iagram.com/aspskim.html

Diagram of a Trickle Filter

Used in marine aquriums. Droplets of water trickle over semi-wet filter media that contains aerobic bacteria.
http://www.iagram.com/trickle.html

Diagram of a Fish Only with live rock marine aquarium

Fish only with live rock marine aquarium. Trickle filter helps process waste from large/messy fish.
http://www.iagram.com/fowlr.html