*     Overflow Prefilter Boxes for Pro Clear Filter Systems
*     Clear intake allows you to observe water level
*     Provides option for non-drilled aquariums to have an overflow system

The Pro Clear Aquatics Overflow Prefilter Box provides an option for an overflow system to an existing rimless tank without the risk of drilling or otherwise damaging the structural integrity of your tank. The Overflow Prefilter box uses a siphoning system to deliver water to the filter sump. Easy to Install and assemble without required tooling.