Reef Culture on LinkedIn




Home > Skimmers and Reactors
A protein skimmer or foam fractionator is a device used mostly in saltwater aquaria to remove organic compounds from the water before they break down into nitrogenous waste. Protein skimming is the only form of aquarium filtration that physically removes organic compounds before they begin to decompose, lightening the load on the biological filter and improving the water's redox potential. Although the process of foam fractionation is commonly known for removal of waste from aquaria, it is, in fact, a rapidly developing chemical process used in the large-scale removal of contaminants from wastewater streams and the enrichment of solutions of biomolecules.

Protein skimming removes certain organic compounds, including proteins and amino acids, by using the polarity of the protein itself. Due to their intrinsic charge, water-borne proteins are either repelled or attracted by the air/water interface and these molecules can be described as hydrophobic (such as fats or oils) or hydrophilic (such as salt, sugar, ammonia, most amino acids, and most inorganic compounds). However, some larger organic molecules can have both hydrophobic and hydrophilic portions. These molecules are called amphipathic or amphiphilic. Commercial protein skimmers work by generating a large air/water interface, specifically by injecting large numbers of bubbles into the water column. In general, the smaller the bubbles the more effective the protein skimming is because the surface area of small bubbles occupying the same volume is much greater than the same volume of larger bubbles. Large numbers of small bubbles present an enormous air/water interface for hydrophobic organic molecules and amphipathic organic molecules to collect on the bubble surface (the air/water interface). Water movement hastens diffusion of organic molecules, which effectively brings more organic molecules to the air/water interface and lets the organic molecules accumulate on the surface of the air bubbles. This process continues until the interface is saturated, unless the bubble is removed from the water or it bursts, in which case the accumulated molecules release back into the water column. However, it is important to note that further exposure of a saturated air bubble to organic molecules may continue to result in changes as compounds that bind more strongly may replace those molecules with a weaker binding that have already accumulated on the interface. Although some aquarists believe that increasing the contact time (or dwell time as it is sometimes called) is always good, it is incorrect to claim that it is always better to increase the contact time between bubbles and the aquarium water. As the bubbles increase near the top of the protein skimmer water column, they become denser and the water begins to drain and create the foam that will carry the organic molecules to the skimmate collection cup or to a separate skimmate waste collector and the organic molecules, and any inorganic molecules that may have become bound to the organic molecules, will be exported from the water system.

In addition to the proteins removed by skimming, there are a number of other organic and inorganic molecules that are typically removed. These include a variety of fats, fatty acids, carbohydrates, metals such as copper and trace elements such as iodine. Particulates and other detritus is also removed, along with phytoplankton and bacteria. This removal is highly desired by the aquarist and is often emphasized by the placement of the skimmer before other forms of filtration; lessening the burden of the filtration system as a whole.
Sort By:
1
Bashea Media Chamber 4-12
Our Price: $170.50 Inc GST
Bashea Media Chamber MC4-18
Our Price: $195.00 Inc GST
The Bashsea Media Chamber extra large design allows for high media volumes, while producing an even flow to maximize water-media contact time.
  • Does not come with a pump
  • For use with all media types ie Carbon, GFO – Not designed for Bio Pellets, AIO ( use the Pellet Master )
  • Full access reaction chamber
  • Water distribution plate eliminates channeling of media
  • Precision water jet cut sponges
  • Precision CNC key hole flanges
  • True O-Ring Seals
  • Hose barb connections
  • Designed and hand built in the U.S.A. using 100% American made acrylic construction
  • Bashsea Media Chamber 4-12

  • 13″ Tall. Chamber: 11-1/2″ X 4″.
  • For tanks up to 500L
  • Does not come with a pump. The recommended flow rate for the submersible pump is 550 to 1000 lph.
  • Hose barb – 1/2″
The Bashsea Media Chamber extra large design allows for high media volumes, while producing an even flow to maximize water-media contact time.

FEATURES:

  • Does not come with a pump
  • For use with all media types ie Carbon, GFO – Not designed for Bio Pellets, AIO ( use the Pellet Master )
  • Full access reaction chamber
  • Water distribution plate eliminates channeling of media
  • Precision water jet cut sponges
  • Precision CNC key hole flanges
  • True O-Ring Seals
  • Hose barb connections
  • Designed and hand built in the U.S.A. using 100% American made acrylic construction
  • Bashsea Media Chamber 4-18

  • 19-1/4″ Tall. Chamber: 17-1/2″ X 4″.
  • For tanks up to 750L
  • Does not come with a pump. The recommended flow rate for the submersible pump is 550 to 1100 lph.
  • Hose barb – 1/2″

   
 
1