A protein skimmer is a device used in aquariums to remove organic compounds from water. It works by creating bubbles that attract and trap proteins and other waste materials, which are then collected in a separate container. This helps maintain water quality and supports the health of aquatic life. Protein skimmers are especially popular in marine aquariums because they effectively reduce harmful substances like nitrates and phosphates. By removing these compounds, skimmers help prevent issues such as algae blooms and improve overall water clarity, making them an essential tool for aquarium enthusiasts.