If you are considering adding a protein skimmer to your tank, you will find this article by Don Carner well worth reading. Not sure which style skimmer to buy? Don describes each one, with details about In-Tank Co-Current and Counter-Current Styles, Hang-On Styles, and Summaries on both In-Tank & Hang-On Skimmer Styles.
MORE: Hang-In/On Tank Skimmers: Compare Prices of the newest models on the market, today.
MORE: In/On Sump Protein Skimmers: Compare Prices of the latest models on the market.
MORE: Already have a skimmer? Tired of performing constant water changes? You can drastically reduce your nitrates and phosphate levels (many times to ZERO!!) with the "Vodka Method" of Nitrate Reduction.