Peak Flow: 792 GPH Maximum Head: 13 Feet Size: 5" L x 3" W x 4.15" H Reef Octopus VarioS DC pumps offer improved performance and precise flow control for your aquarium's reactors, sump, or closed-loop system. The VarioS Controller provides full control, allowing you to adjust pump flow, set feed modes (15 or 60 minutes), add a safety float switch (included), or connect to a third-party controller like an Apex.