Helix Life Support Mesh Media Bag with Drawstring Hecht Rubber Corp Overflow pipe automatically vents air

Overflow pipe automatically vents air from chamber

Gold Label "One-Shot" Pond & Aquarium Sealant is a pressurized black silicone sealant for application underwater

Model Shape Diameter Length Fitting(s) C30D-106CN Cylinder 1

Intended for use with ornamental fish

they keep areas of water open (free of ice) to support fish health and to protect permanent structures from ice damage

Helix Life Support Mesh Media Bag with Drawstring Hecht Rubber Corp Overflow pipe automatically vents airMedia performs best as a filter when it is not in a bag, but unless you have a filter specifically made for loose lava rock or other media (like the Helix Bio Mechanical Waterfall Filter or Bio Mechanical Reactor), many people prefer keeping their media in a bag for easy removal and rinsing. The Helix Mesh Media Bag measures 19" x 23", and features a drawstring for easy closing.