Swimming Pool & Spa Education

Hardness Increaser

Used to raise Hardness levels. The scientific name is Calcium Chloride. Calcium Chloride is typically packaged and sold as "Hardness Increaser," "Hardness Up," or "Hardness Plus." Calcium Chloride is granular. Read the instructions on the label to determine the amount to add, how it should be added (either diluted in water or broadcast straight from the container), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions. Note: There is no product that is packaged and sold as a Hardness Decreaser. If your Hardness level is too high, you will have to drain your pool, either partially or completely, in order to lower the Hardness level.

Soda Ash

An alternative to raise pH. Like Sodium Carbonate (pH Increaser), Soda Ash is also granular. Read the instructions on the label to determine the amount to add, how it should be add (either diluted in water or broadcast straight from the package), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions.

pH Increaser

Used to raise pH. The Scientific name is Sodium Carbonate. Sodium Carbonate is typically packaged and sold as "pH Increaser," "pH Up," or "pH Plus." Sodium Carbonate is granular. Read the instructions on the label to determine the amount to add, how it must be added (either diluted in water or broadcast straight from the container), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions.

Alkalinity Increaser

Used to raise Alkalinity. The scientific name is Sodium Bicarbonate. Sodium Bicarbonate is typically packaged and sold as "Alkalinity Increaser," "Alkalinity Up," or "Alkalinity Plus." Sodium Bicarbonate is granular. Read the instructions on the label to determine the amount to add, how it must be added (either diluted in water or broadcast straight from the container), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions.

Muriatic Acid

An alternative to lower pH and Alkalinity. Muriatic acid is in liquid form. Read the instructions on the label to determine the amount to add, how it must be added (either diluted in water or poured straight from the bottle), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions. Be extra careful when handling muriatic acid.

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