GH Series deep bed filters provides approximately 40% more filter bed depth compare to regular media filters. With extra filter bed depth, deep bed filters offer superior in-depth filtration. With fiberglass through out the body, inside and out, means they are reliable and suitable for all-weather performance. Features and benefits: Made to last- Full laminated fiberglass tank with gel coat smooth finish- 40% more filter bed depth- UV resistance surface to work under the Au