LITTLE TUB FILTER LITTLE TUB FILTER $172.50 SKU: LPP25 QTY: Click here to save 5% off of your order! LITTLE TUB FILTER A small biological filter is capable of filtering up to a 500 gallon fish pond.  It can be placed in or above ground and concealed into the landscape.  Uses a spray bar to oxygenate the water before it flows down through the bio media. The water is returned to the pond through a stand pipe. Measures 21-1/2 diameter x 14 high. Max flow of 800 gph. 3/4 hose barb inlet and 1-1/2 fpt outlet