Eshopps PF-300 HOB Overflow Box

Add an overflow to any aquarium with Eshopps PF series of hang on back overflows. Adding a sump to a tank will allow you to hide equipment and while adding water volume making your tank more stable. Traditional overflows require you to drill holes in your aquarium where Eshopps PF HOB overflows use a siphon to draw water over the wall of the tank without any modifications to your aquarium. 

In most cases, we would recommend drilling your aquarium and using an internal overflow like the Eshopps Eclipse, but in some situations, a HOB style overflow may be the best option. Hang on back overflows do require more monitoring and safety precautions to be in place, but can be completely reliable if installed properly and maintained regularly. Installation only takes a couple of minutes, and the PF-300 only requires 3" of clearance outside the tank to drain water down to a sump, refugium, or wet/dry filter. Just lower the overflow box onto your aquarium and then connect your favorite type of plumbing to the included 1" bulkhead.