Simplicity 240DC Protein Skimmer

In-sump protein skimmer with a controllable DC pump and needle wheel, for a water level of 7 to 9.5 in. Its Amazon page says for tanks up to 240 gallons. Bulk Reef Supply's page rates it for 240 gallons at a light bioload, 180 medium and 120 heavy, and it's listed here at the medium figure.

Filtration

Skimmer

Max tank volume

681.4 L