Professional Durable Clear Flexible Airline Tubing for Aquariums, Terrariums, and Hydroponics - 25 Feet Long - Sold By Pidaz This professional silicone airline tubing is clear, flexible, and durable! Made for use in aquariums, terrariums, and hydroponics systems Great for use with aquarium ornaments, bubblers, Blue Spotted Air Stone Discs & air stones, and a variety of air driven filters Easily hide and blend into your aquarium, terrarium, or hydroponics system Made of silicone, 25-feet in long Designed to fit all standard outlets, including air pumps, check valves, filtration system, air stones, air flow control levers, and aquarium ornaments.