At AquaCave, we offer some of the best selection & best prices on Heavy Duty Whitewater linear air pumps for you marine, reef, and freshwater aquarium. Whitewater linear air pump s are great for a variety of applications, including aquariums, bait tanks, holding systems, hatcheries, and aquaculture. Whitewater linear air pump s are powerful and reliable, they produce large volume of air with a very high pressure. Designed for indoor use only.