What Do Protein Skimmers Do?

Protein skimmers are a part of the filtration system used on many saltwater aquariums. Saltwater hobbyists who have only predatory fish in the tank may not need a protein skimmer. However, those with a reef tank or a tank that includes corals or anemones usually find a protein skimmer is a necessary component to the filtration system.

Removes Organic Waste

Protein skimmers remove protein and other organic waste from fish tank water. These items eventually break down into ammonia and other harmful elements.

Removes Toxins

Corals and some other aquatic invertebrates release toxins into the water. Protein skimmers remove these toxins so the levels don't build up to harmful levels in the water.

Reduce Trace Elements

An undesired effect of protein skimmers is that they reduce the amount of trace elements, which can lethal to filter feeding aquatic life. The protein skimmer should be turned off when trace element supplements are added to the water to allow filter feeders to eat.

Increased Oxygen

As water goes through the protein skimmer, it is oxygenated. This is beneficial to fish and other aquatic life in the tank, as more oxygen in the tank reduces the risk of diseases.

Reduces Frequency of Water Changes

Because the levels of harmful chemicals are removed from the water, the water has to be changed less frequently than normal. For example, a water change is required every two weeks in a reef tank without a protein skimmer but, when a protein skimmer is used, this can be increased to once a month.