The Fluval Sea Protein Skimmer SP1 is a top-of-the-line filter for your marine aquarium. With a tank capacity of 45 gallons, this protein skimmer is perfect for keeping your aquarium clean and healthy. The filter is designed with both internal and external catch cups, ensuring that your fish and aquarium are protected from harmful bacteria and debris. This protein skimmer is a great addition to any aquarium setup, especially for those who want to maintain a healthy and vibrant marine ecosystem. The Fluval Sea Protein Skimmer SP1 is easy to install and use, and is perfect for both novice and experienced aquarists. With its powerful 4 watt motor, this protein skimmer is able to efficiently remove protein and other nutrients from your aquarium water.---Box has small shelf wear damage.see pcs---