DC-900525-1.9, Duracast 525 Gallon Heavy Duty Vertical Tank | 900525 When you need heavy duty storage strength, use Duracast’s 525 gallon vertical tanks. These plastic storage tanks are designed to hold aggressive contents like industrial chemicals without becoming damaged. The impressive strength that these tanks have makes them a much better option than flimsier plastic substitutes. These tanks can handle tough environments because they have a high resistance to environmental stress. Their low temperature impact strength means that these tanks are less likely to crack in frigid temperatures. These vertical tanks are made of UV-stabilized resin to slow sun damage and extend their life. People can use these tanks to store agricultural chemicals, industrial chemicals, most acids, liquid fertilizer, vegetable oils, biodiesel and potable water. This is a 1.9 specific gravity tank.