Hach Hardness 1, 4 Oz Control Box w/Low Pressure TDS+ Level C If unsure about any step

If unsure about any step

Helps maintain dosing accuracy by clearing gas bubbles

Durable white finish blends seamlessly with most water softener setups

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Hach Hardness 1, 4 Oz Control Box w/Low Pressure TDS+ Level C If unsure about any stepHardness 1 is part of Hach's established reagent lineup used in the determination of water hardness, and this 4 oz bottle keeps your testing routine well supplied for the long term. Water hardness, caused primarily by dissolved calcium and magnesium, is one of the single most important parameters in residential and commercial water treatment, because it drives scale formation, reduces soap and detergent efficiency, and directly determines how