DC-902500-1.5, Duracast 2500 Gallon Plastic Storage Tank | 902500 These plastic storage tanks are manufactured to provide long-lasting storage. The polyethylene resin is compounded with UV stabilizers to combat sun damage and keep the tanks in great condition for longer. The overall toughness of these tanks means that they will not break down easily in unfavorable environmental conditions. Because these tanks are able to handle chemical attack without becoming damaged, they are perfect vessels for storing a variety of hazardous chemicals. People also commonly use these tanks to store water, liquid fertilizer, liquid feed and many kinds of acids. These tanks are equipped with a 16-inch vented lid and gallon calibrations that are molded into the tank. This is a 1.5 specific gravity tank.