Is your protein skimmer not producing enough foam? This Red Devil rotor with needle wheel might be the upgrade you need. It's a brand-new replacement impeller designed for Red Devil SP1, SP2, or SP3 skimmer pumps (check compatibility). The needle wheel design chops air into super fine bubbles, making your skimmer more efficient at removing waste from saltwater aquariums. It's from Marine Source and works with all water types. Just swap out your old rotor for this one to boost bubble production and improve your tank's water quality. A simple, affordable part that can make a big difference in your reef or marine setup.