DC-900650-1.9, Duracast 650 Gallon Heavy Duty Vertical Tank | 900650 Heavy duty, and ready for just about anything, these vertical storage tanks are your go-to solution for storing hazardous chemicals. Because these tanks have a high resistance to chemical attack, they will not deteriorate from even the most corrosive or aggressive chemicals. These vertical tanks can also stand up strong in adverse environments. Their low-impact strength means that these tanks can handle extremely low temperatures well and are less likely to crack. The UV-stabilized resin adds durability and helps to combat UV deterioration. Besides chemicals, people can use these tanks to store certain acids, liquid fertilizer, biodiesel, liquid feed and potable water. Available colors include natural white, green and black. The natural white tanks are translucent and allow you to view contents. Black and green options help to slow down algae growth when storing water. This is a 1.9 specific gravity tank.