As a member of the Reef Octopus Classic Series, the Classic 150INT In-Sump Protein Skimmer is ideal for marine aquariums up to 210 gallons. Made of high-quality cast acrylic, it boasts an adjustable gate valve, a quick release neck for easy cup removal, and a bubble diffuser. Additionally, it features an o-ring sealed union pump mount, an air shredding Aquatrance 2000s pinwheel pump, and an air silencer. When properly matched with the bioload of the system, this protein skimmer provides effective filtration.