Do you need a protein skimmer on a saltwater tank?

A protein skimmer is a device that helps to remove organic compounds and other debris from the water in a saltwater tank. While it is not strictly necessary to have a protein skimmer in a saltwater tank, it is highly recommended for maintaining good water quality and a healthy environment for fish, corals, and other invertebrates. Protein skimmers work by creating a column of air bubbles that attracts and removes organic material before it has a chance to break down in the tank. This not only helps to keep the water clear and clean but also reduces the risk of harmful bacteria and other organisms that can cause problems for the tank's inhabitants.