I asked and we got these directions.
Quick Setup Guide
NOTE: The Eshopps Wet-Dry Filter requires an appropriately sized submersible return pump. The maximum flow rate of the pump must match the maximum flow rate of the overflow box for proper operation.
â€¢Unpack and visually inspect the product.
â€¢Install bio-ball media, drip plate, filter pad, and egg crate.
â€¢Set up Overflow Box onto aquarium.
â€¢Securely attach provided flexible drain hose to sump drain tube. Repeat this step for the second hose on Models WD-150CS (#32895), WD-200CS (#32896), and WD-300CS (#32897).
â€¢Place the sump under your aquarium in an aquarium stand.
â€¢Securely attach the end of the drain hose(s) to the Overflow Box drain fitting. (Repeat this step for the second drain hose on dual intake models.)
â€¢Install appropriately sized return pumps (sold separately) in the Pump Chamber. Secure provided return line and nozzle onto the return pump. NOTE: DO NOT plug submersible return pump into power source until pump is fully submersed underwater.
â€¢Start the siphon for the Overflow Box to transport aquarium water to the wet-dry filter.
â€¢Once the return pump is completely submersed, plug return pump into power source.
If you have more questions, please feel free to contact our Customer Service Department at 1-800-443-1160. You can also email them at CustomerService@FosterAndSmithAquatics.com.