The Filtration HOG2 UAS Upflow Alg is an advanced algae scrubber designed to effectively remove nutrients from saltwater aquariums. It operates on both 120V and 240V, making it versatile for international use. The scrubber features a unique upflow design that keeps everything submerged, preventing any potential overflow issues. With dimensions of 6 5/8" wide x 8 3/4" high x 1 1/2" thick (16.6cm x 21.9cm x 3.75cm), this unit is ideal for larger tanks with walls up to 5/8" thick, providing a robust attachment mechanism and enhanced durability. It offers 48 square inches of algal growth surface area designed to handle daily feeding amounts of two frozen cubes or equivalent nutrition from flake food and pellets, ensuring efficient nutrient absorption without overfeeding. This product is best suited for advanced reef aquarium enthusiasts who seek an effective method of maintaining water quality through biological filtration.