I have an aerobic septic system (sprays on the lawn after it is chlorinated) and it requires potassium chloride instead of regular sodium chloride so the grass doesn't die from the salt. ANYWAY, I just wanted to let those out there know that Home depot and costco sell the 40 lbs. bags for $25-$28 each BUT tractor supply sells the same 40 lbs. for $17!!!!!![]()



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