Overflow Boxes

For the serious hobbyist looking to run a high-performance aquarium sump or wet/dry filter, an aquarium overflow box is absolutely essential. These critical pieces of equipment create the necessary bridge to transfer water safely and efficiently from your display tank down to your filtration system, allowing for powerful processing, water exchange, and stable water parameters. Whether you are setting up a state-of-the-art reef tank or a complex freshwater system, a reliable overflow is the key to harnessing the power of external filtration without having to drill your tank.

Our selection of overflow boxes features robust, reliable designs that prevent flooding and provide silent, consistent water movement. We stock both basic models and advanced drill-less overflow systems that utilize reliable U-Tube siphon technology to get your sump up and running quickly. We also provide necessary accessories like return jets and drill kits for those pursuing a permanent, "reef-ready" installation. These components ensure a clean, professional look while maintaining the constant flow needed for a healthy ecosystem.

Don’t settle for less when it comes to the heart of your aquarium’s filtration. Invest in a high-quality overflow solution to achieve superior water quality and peace of mind. Browse our range of reliable systems and find the perfect match for your tank size and flow rate requirements—all available for convenient delivery across Canada.