HTH™ Pool Care Alkalinity Up

Pool Alkalinity Increaser

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  • Child on a red and white inner tube in a pool with HTH Pool Care branding.

HTH™ Pool Care Alkalinity Up

Pool Alkalinity Increaser

HTH™ Pool Care Alkalinity Up is a pool alkalinity increaser that raises total alkalinity into the recommended 80-120 ppm range to stabilize pH.

  • Fixes the root cause of pH swings: low total alkalinity
  • Target range: 80-120 ppm
  • Add with the pump running, retest after 6-8 hours of circulation
  • Protects pool surfaces and equipment from corrosion
  • Safe for vinyl-lined, concrete, fiberglass, and saltwater pools

Product Benefits

Stops Constant pH Swings

If you keep adjusting pool pH and it keeps drifting back, low total alkalinity is almost always the cause. Total alkalinity acts as a buffer that holds pH steady. When it drops below 80 ppm, rain, swimmers, and routine chemical additions push pH around quickly. Raising alkalinity first is what makes pH adjustments actually stick.

Protects Pool Surfaces and Equipment

Low alkalinity makes water corrosive, which etches plaster, damages vinyl liners, and corrodes metal components in pumps, filters, and heaters. Maintaining 80-120 ppm extends the life of every part of your pool system.

Improves Chlorine Performance

When alkalinity is balanced, pH stays in the ideal 7.2-7.6 range, which is where chlorine works most efficiently. Pools with low alkalinity often consume more chlorine because the sanitizer can't perform at its best when pH is unstable.

Compatible With All Pool Types

Safe for vinyl-lined, concrete, fiberglass, and saltwater pools. Salt chlorine generator pools still need balanced alkalinity to function properly. Add directly to the pool with the pump running and retest after 6-8 hours of circulation.

How to Use

Testing Requirements

Test pool water with HTH™ 6-way Test Strips for total alkalinity level before application. Ideal range: 80-120 ppm.

How to Use

For the Best Results: Keep the total alkalinity at 60–120 parts per million (ppm).

  1. Measure total alkalinity of pool water with an HTH test kit or test strips.
  2. If the alkalinity is below 60 parts per million (ppm), add this product.
  3. Broadcast evenly over the pool surface.
  4. Use the table below to determine the correct dosage.

Dosage Guidelines

  • Refer to the product label for dosage guidelines.
  • Dosage varies based on pool size and desired alkalinity increase

Ingredients

Active Ingredient

  • Sodium Bicarbonate - 100%

Classification

CAUTION - Handle with care

Safety, Storage, and Disposal

Safety Precautions

  • Do not mix with other chemicals
  • Use proper personal protective equipment when handling
  • Keep out of reach of children
  • Avoid contact with eyes and skin

First Aid

  • Eye Contact: Flush with water for 15 minutes
  • If Swallowed: Drink large quantities of water and call a physician

Storage and Disposal

Store in a tightly closed container in a cool place. Use entire contents, then triple rinse and offer for recycling, or dispose in accordance with state and local regulations. Do not reuse empty container.

Emergency Handling

  • Keep out of reach of children
  • In case of eye contact, flush with water for 15 minutes
  • If swallowed, drink large quantities of water and call physician immediately

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Quick Pool Tips

  • Always read product label directions prior to using and use only as directed

  • Always add chemicals to pool water, never the other way around

  • Never add chemicals to pool water when people are in the pool

  • Warning symbol with a triangle and exclamation mark on a blue background

    Never mix products together

  • Always store pool products in a cool, dry location and out of direct sunlight