HTH spa™ pH Up

Hot Tub pH Increaser for Low pH

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HTH spa™ pH Up

Hot Tub pH Increaser for Low pH

HTH™ Spa pH Up helps you restore the perfect water balance so you can relax with confidence.

  • This fast-dissolving spa pH up formula raises low pH levels to prevent corrosion, protect spa equipment, and reduce irritation for a more comfortable soak.
  • By maintaining proper pH, your sanitizer works more efficiently keeping your spa clean, clear, and inviting.
  • Compatible with all spa types, including bromine, chlorine, and biguanide systems.

HTH™ Spa pH Up makes balancing water easy, so you can unwind worry-free. HTH™ is here to help. 

Product Benefits

Contains mineral crystals

HTH spa™ pH Up is formulated to provide a more relaxing spa experience.

Compatible with all spas

HTH spa™ pH Up is great for all spas, including bromine, chlorine and biguanide.

You’re all clear with HTH™

For best results, use HTH spa™ Test Strips twice a week to test, and use our spa pH increaser to balance and maintain total pH levels between 7.2 and 7.8 ppm.

How to Use

How to Use

Why You Should Use This Product: HTH Spa pH Up raises low pH levels in spa and hot tub water. Maintaining proper pH helps prevent corrosion, improves sanitizer effectiveness, and keeps water comfortable for bathers.

Before Use: Measure spa water pH using an HTH Spa Test Kit or Test Strips. Always keep the circulation system running while adding this product.

To Raise pH

Use the table below to determine the correct amount of HTH Spa pH Up based on your spa water volume and current pH level.

Volume of Water pH 7.4 & Above pH 7.3 pH 7.2 pH 7.1 & Below
200 gallons Not required 1 tsp 2 tsp 3 tsp
400 gallons Not required 2 tsp 4 tsp 6 tsp
800 gallons Not required 4 tsp 8 tsp 12 tsp

Application Instructions

Add the measured amount of HTH Spa pH Up directly into the spa filter skimmer with the circulation system running.

Allow the water to circulate for 30 minutes, then retest pH. Add additional product if needed.

Use only in spa or hot tub water.

Do not mix with other chemicals, including other HTH Spa products.

Ingredients

Ingredients

Principal Functioning Agent:

Sodium Carbonate: 99%

Constituents Ineffective as Adjuvants: 1%

Total: 100%

Safety, Storage, and Disposal

Safety, Storage & Label Guidance

Use this product only as directed. Avoid contact with eyes and skin.

Wear protective eyewear and gloves when handling.

Store in a tightly closed container, out of reach of children and away from heat or open flame.

Use entire contents when possible. Triple rinse empty container and dispose in accordance with local regulations.

For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.

Reviews

 

Quick Spa Tips

  • Always read product label directions and use only as directed

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

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

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

    Never mix products together

  • Always store spa products in a cool, dry location and away from direct sunlight

  • Outline of a pair of gloves on a navy blue background

    Always wear proper safety equipment when handling chemicals