Blue Thumb Elite Waterfall Boxes Strong, Durable Waterfall Filters The octagonal design provides maximum strength, and a much easier shape to camouflage than circular or rectangle designs. With 2 bulkhead openings, pipes can be installed from either side. The second opening can be used as a back flush to perform water changes or connect multiple pumps or plumbing lines. These boxes come with self-tapping stainless steel screws for easy installation and corrosion resistance. The waterfall snout is reversible. Install in the usual way for basic installation or reverse the snout for a more advanced waterfall appearance. Includes: Matala Biological Filtration Mats Landscape Lid for concealing the unit Blue Thumb Small Elite Waterfall Box Blue Thumb Medium Elite Waterfall Box Blue Thumb Large Elite Waterfall Box Blue Thumb Extra Large Elite Waterfall Box Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.0 out of 5 stars 5 4.0 out of 5 stars 5 4.0 out of 5 stars 5 4.0 out of 5 stars 5 Price $359.99$359.99 $599.99$599.99 $809.99$809.99 $1,169.99$1,169.99 Max Pond Volume 1,500 Gallons 3,500 Gallons 6,000 Gallons 10,000 Gallons Dimensions 23” x 24.75” x 21.75” 31” x 30.5” x 23” 31.75” x 40.5” x 25.75” 35.75” x 50” x 30.75” Max Pump Flow 3.500 gph 6,000 gph 10,000 gph 20,000 gph Waterfall Width 14" Spillway 22" Spillway 30" Spillway 40" Spillway About Blue Thumb Whether you’re an Industry Pro, Weekend DIY Warrior, Passionate Hobbyist, or just someone who loves water, we have everything you need to add a beautiful water feature to your home.