Only Tri-State Pools offers aluminum in above ground pools. An above ground swimming pool is in constant contact with the elements. Aluminum pools were designed as a rust-free alternative to steel pools. Aluminum pools have become popular over the last 10 to 15 years because of their ability to handle inclement weather. When aluminum is exposed to air, it becomes covered with a tough, transparent layer to aluminum oxide that helps resists corrosion. Aluminum does not tarnish or rust and has an extremely high strength-to-weight ratio. It also becomes stronger and retains its toughness as it gets colder.