Aqua Medic OFB Aquarium Overflow Box - OFB 2500

The Aqua Medic OFB overflow box hangs on the aquarium and drains surface water down to a sump filter under the tank, so an existing aquarium can run a sump without drilling.

Key Features

• No Drilling: connects an undrilled tank to an under-tank filter system.
• Constant Water Level: once running, it holds the aquarium at a steady level.
• Acrylic Build: made from acrylic, with a guard to keep fish out and adjusting knobs to set its height.
• Surface Skimming: draws water from the surface, where films and debris collect.

Sizes We Hold

• OFB 2500 - up to 2,500 L/h, 19 x 18 x 25 cm, one tank connector.
• OFB 5000 - up to 5,000 L/h, 19 x 25 x 25 cm, two tank connectors.

Good To Know

• Set the overflow edge about 5 to 8 mm below the water level.
• To start it, the air must be drawn out through the top nipple. The safest way is to connect the air hose to the intake of a circulation pump in the tank.
• Make sure the sump can hold the water that drains down when the return pump stops.
• Fit it as far as possible from the return inlet.