<https://matherpumps.com/product/1000-gallon-water-tank-or-chemical-tank-premium-weight/#webpage>
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"A Premium Weight vertical tank is thicker and will last longer than a light duty water tank.  The premium weight can handle chemicals and other liquids up to 1.5 specific gravity. These vertical tanks offer the largest gallonage selections"
<https://matherpumps.com/product/1000-gallon-water-tank-or-chemical-tank-premium-weight/>