Bulkreefsupply.com carries quality internal protein skimmers from Vertex, Skimz, Reef Octopus. Internal skimmers usually are classified as a Sump Saver or In Sump skimmer. Space saving skimmers have the pump within the body of the skimmer where the in sump have the pump outside the skimmer body. Shop the Vertex Omega series with a wine bottle shape, Sicce pump and titanium screws. Same exceptional engineering as their Vertex Alpha skimmers at a reasonable price point. Shop the Regal and Classic lines from Reef Octopus or the numerous skimmers we carry from Skimz including the Oval with DC pumps.