Perfect-A-Flo Undergravel Filters by Perfecto

Draws water evenly over the entire plate. Provides valuable biological filtration under your substrate. By simply adding an air pump or powerhead, your tank can cultivate massive amounts of beneficial bacteria under the gravel and out of sight. Perfecto filters are manufactured with a unique design that permits uniform flow across the entire tank. Perfecto filters are easy to install. A fish protector on the flow spouts and a raised tube connector to keep gravel from falling beneath the plate. Requires either an air pump or a powerhead to operate. Made in USA.