Marine skimmers (protein skimmers) are a key piece of filtration for saltwater aquariums, helping to keep water crystal clear and nutrients under control. They work by mixing air and water to pull out dissolved organics (like fish waste and excess food) before they break down into nitrate and phosphate, reducing algae growth and improving overall water quality. A good skimmer is especially important on heavily stocked or reef systems, supporting stable parameters and healthier fish and corals. When choosing a skimmer, look at your tank volume, bioload and sump space, and aim for a reliable unit rated slightly above your actual water volume for the best results.
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