Fish R Fun Powerful Protein SkimmerThis Large Aquarium Protein Skimmer Removes and collects protein waste from water Waste particles are collected by very small air bubbles formming waste foam at the top of the skimmer Comes with a Wooden air stone that generates very small air bubbles. Easy to assemble and easy to clean Air tube, wooden air stone and suction caps are inclusive Good for Marine Aquarium of up to 340 Litres 90 gallons Airpump Needed Instructions: Connect Air tube with