Review on Marine Metal Bubbles Pump B-3: Enhancing Aeration and Oxygen Levels for Aquatic Environments by Sophia Medina

Store in original packaging for added water protection. The first thing I do when buying one is to lubricate all electrical connections with dielectric grease. The product is used for additional aeration of existing wells on sea kayaks. The environment is characterized by harsh salt spray and occasional submersion. Eventually water will seep into the "watertight" interior but for the money this is a good product.