Iron Pro 2 Combination Water Softener and Iron Filter. The Iron Pro 2 is a saltbased whole house water softener made to remove iron. Its 64,000grain capacity is perfect for a family of three to four with moderately hard water, and its topquality components provide years of worryfree use. Unlike some water softeners, the Iron Pro 2 uses higherquality fine mesh resin to remove iron — up ...