Poly-Mart manufactures a line of Liquid Storage Tanks with a Specific Gravity of 1.5 & 1.9. A 1.5 specific gravity means you can store liquid 1.5 times as dense as water. Our line of Plastic Storage Tanks are generally used for Bulk Liquid Fertilizer Storage, Farm & Agriculture Chemicals Storage, DEF Storage (Diesel Exhaust Fluid), Industrial Chemical Storage, Reverse Osmosis Systems, Brine Storage, Soap Storage, Waste Vegetable Oil Storage & Non Potable Water Storage. Our Poly Storage Tanks are manufactured in a translucent white color for ease in level viewing and are also equipped with gallon markers. Our Plastic Storage Tanks come with vented slosh proof lids, inlet bulk head fitting, outlet bulkhead fitting and an outlet plug. These tanks come standard in a natural white color for ease in liquid level viewing but are available to be custom ordered in any of our 11 colors. Are you storing a liquid and not sure if it’s compatible with polyethylene? View our Chemical Resistance Chart as a reference but always consult your chemical supplier if you are unsure of it’s compatibility of polyethylene.