Protein skimming (foam fractionation) is actually another type of filtration.
Protein skimming allows for the removal of certain types of DOC’s (dissolved organic compounds) from the water. What happens is that very small bubbles of air are passed through the salt water – this occurs inside what is normally called a reaction chamber. The organic matter in the water ‘sticks’ to the side of the air bubble and rises up with the bubble. Once the bubble reaches the top of the chamber foam is created. Over time these organics get pushed higher and higher until eventually they rise and fall into the collection cup of the skimmer ready for emptying by the aquarist.Read more →