Dura-Cast's 90 gallon vertical tanks are manufactured to the highest quality standards in the industry. Dura-Cast products have superior mechanical properties, high stiffness, excellent low temperature impact strength and outstanding environmental stress crack resistance. This makes them excellent storage solutions in extreme environments. Vertical tanks are molded of poly resin that is FDA approved and UV stabilized. Because Dura-Cast tanks have a high resistance to chemical attacks, they are able to safely store corrosive chemicals. Dura-Cast products require little maintenance and are corrosion and rust resistant. Tank colors include white, green and black. Natural white tanks are translucent for viewing content levels. Black and green options are best to prevent algae growth.