Bulkreefsupply.com carries several brands of submersible pumps that are used to move water from your sump back up to your tank. Reefers usually purchase a submersible pump that can move 10X the water of the tank size and head pressure (the pressure needed to move the water up to the tank as well as through the elbow plumbing associated with the sump. Choose between Mag-Drive, Eheim Universal, Eheim Compact and Ocean Runner submersible pumps ranging from 80GPH to 2400GPH.