Reptology presents the 70 GPH Fully Submersible Internal Filter by Penn-Plax. This submersible filter quietly delivers crystal clear water throughout turtle tanks and reptile terrariums. It cycles water at 70 Gallons per Hour (GPH) for tanks up to 15 Gallons in size. It also works well with aquariums! Shop Penn-Plax for All Your Pet’s Needs: Penn-Plax is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.