Eshopps Hang-On Overflow Box API Ph Test These tabs are inserted into

These tabs are inserted into the gravel

adventure parks and hobbyists worldwide

Use Instructions: To remove childproof safely cap: push down on cap while turning

Maximum Size: 7"- 9"

For freshwater or saltwater use

Eshopps Hang-On Overflow Box API Ph Test These tabs are inserted intoThe overflow box effectively transport aquarium water to under cabinet sumps, refugiums, or wet dry filters. These high quality overflow boxes features bulkhead fittings for secure and convenient installation. The U tube style compact overflow boxes are designed to fit between your tank and your wall to maximize space usage in your aquarium setup. With only 3 in. required between your tank and your wall, these boxes are excellent for optimizing space.