RedSea Reefer Skimmer 900 With DC PumpRedSea Smart Reefer DC skimmer 900 The RedSea Smart Reefer DC Skimmer 900 is the new self leveling protein skimmer. The unit is extremely efficient thanks to its DC pump, the unit includes the special self leveling technology which prevents over skimming and spills from full cups. This is thanks to the included self leveling sensor which monitors the skimmers operation and skim results, sending signals to the pump to lower or increase speeds as