In/On Tank counter current protein skimmers were the first type of skimmers to appear in the saltwater aquarium hobby. They were simple devices which used an air pump driven airstone, the bubbles from which collected proteins and deposited them in a collection cup. These skimmers are the least expensive and easy to install and operate. With in-tank skimmers, there
Bubble Magus Protein Skimmers for Saltwater Aquariums & Reefs
The shape of this skimmer (half-cone) lends to improved foam collection. It features a pinwheel impeller and a Hailea OTP pump with a venturi air injector. While other protein skimmers for saltwater aquariums (like the Coralife Super Skimmer) have a cheap, loose knob that regulates the water height within the body of the device, the Reef Octopus Skimmer has a substantial, signature gate valve to allow precise control of the water level. Based on my experiences with the Coralife protein skimmer, this seems like well designed feature.
Saltwater Aquarium Protein Skimmer - Saltwater Aquarium Online Guide
Protein skimmers have become a standard component in saltwater and reef aquarium filtration systems as they are very effective at removing dissolved organic compounds from aquarium water.
Reef Octopus Protein Skimmers for Saltwater Aquariums & Reefs.
A protein skimmer, also sometimes referred to as a foam fractionator, is a piece of aquarium equipment that is primarily used in saltwater aquariums in order to remove dissolved organic compounds (DOC) and other harmful substances that if not removed can breakdown in the aquarium or filter adding to the biological load on an aquarium. Protein skimmers remove these hydrophilic substances completely from the water using air bubbles that are collected in a collection cup. As air and water are mixed in the skimmer chamber the bubbles rise and take with them the dissolved organics that are attracted to the bubble surface. When the bubbles with the proteins, amino acids and other nasty stuff bubble up the tube into the collection cup they are completely removed from the aquarium.One of the first questions new saltwater hobbyists seem to ask is whether they really need a protein skimmer for their first setup. Especially when they start to shop for a skimmer. The short answer is NO, you don't have to run a protein skimmer on your setup. There are many hobbyists that run successful systems without them. However, these hobbyists also realize the importance of regular partial water changes for the aquarium and how important water changes are to the health and well being of the animals in their care.