When Deltec released their new TC & SC skimmer lines we wondered how their bubble chamber works compared to other high end skimmers on the market. One of the features ofÂ “not using sump water twice” got us curious, as most protein skimmers on the market don’t offer this important feature. Most skimmers re-use the same sump water over and over before the water is then sent off to another part of the aquarium filtration system. Deltec uses a double water chamber, which sounds confusing but it really isn’t. Water is drawn from the sump in the lower chamber and then that same water that has been mixed with air is then reintroduced back into the skimmer through another chamber, which is directly on top of the first chamber on the skimmer. This offers significant efficiency advantages compared to traditional skimmers, something we would be happy to see more of from other companies.