HTH spa™ pH Down
Hot Tub pH Decreaser for High pH
HTH spa™ pH Down
Hot Tub pH Decreaser for High pH
HTH spa™ pH Down helps you take control of your spa water with confidence.
- This powerful spa pH down formula lowers high pH levels to restore balance, clarity, and comfort to your hot tub.
- By optimizing water chemistry, it enhances sanitizer performance, prevents scale buildup, and reduces skin and eye irritation.
- Compatible with all spa types including bromine, chlorine, and biguanide systems.
HTH spa™ pH Down simplifies water care for a soothing, worry-free spa experiences every time. Hot Tub balancing made simple!
Product Benefits
How to Use
Ingredients
Principal Functioning Agent:
Sodium Bisulfate: 91%
Constituents Ineffective as Adjuvants: 9%
Total: 100%
To Lower pH
Use the table below to determine the correct amount of HTH Spa pH Down based on your spa water volume and current pH level.
| Volume of Water | pH 7.2–7.6 | pH 7.6–7.8 | pH 7.8–8.0 | pH 8.0–8.4 | Above pH 8.4 |
|---|---|---|---|---|---|
| 200 gallons | Not required | 0.5 tsp | 0.75 tsp | 1.5 tsp | 2 tsp |
| 400 gallons | Not required | 0.75 tsp | 1.5 tsp | 3 tsp | 3.5 tsp |
| 800 gallons | Not required | 1.5 tsp | 3 tsp | 6 tsp | 7 tsp |
Application Instructions
Add the measured amount of HTH Spa pH Down 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 to reach the recommended pH range.
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 Bisulfate: 91%
Constituents Ineffective as Adjuvants: 9%
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 cool, dry, well‑ventilated place, away from chlorine, bromine, or oxidizing agents.
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
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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
Never mix products together
Always store spa products in a cool, dry location and away from direct sunlight
Always wear proper safety equipment when handling chemicals
