Pro-Clean Gravel Washer & Siphon Kit - Large The Python Pro-Clean Gravel Washer & Siphon Kit is perfect for the beginner and experienced hobbyist alike. It effectively separates and removes debris from your aquarium while you perform routine water changes. The Pro-Clean is constructed using only the highest quality materials. The Large size is ideal for aquariums 20-55 gallons in size. 2" x 16" Tube / 6 ft Hose