Tunze Skimmers - The Comline TUNZE® Protein Skimmers are a super efficient Hi-End fractionator that takes the "sump style" filtration right out of the equation. The “Flash skimming” principle enables highly efficient foam production of organic-rich surface water. These small in-tank units are the only skimmers to actually pull protein rich water off the surface. These skimmers generates large volumes of fine air bubbles and is especially quiet during operation. Especially the DC models.