St. Cyr Alkalinity Increase 25lbs
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St. Cyr Alkalinity Increase 25lbs is a granular product used to raise total alkalinity in spa or hot tub water, stabilizing pH levels, preventing corrosion, and ensuring comfortable, balanced water for soaking. Its active ingredient is typically sodium bicarbonate, which provides precise control over alkalinity without introducing unwanted additives.
Key Features and Benefits
- Raises total alkalinity for stable, comfortable water.
- Prevents pH bounce and supports effective sanitation.
- Reduces risk of corrosion and damage to spa surfaces and equipment.
- Easy-to-use granular format for accurate dosing.
- Compatible with all major spa and pool sanitizers.
How to Use
- Test water before dosing to determine current alkalinity (ideal range: 80–150 ppm for spas).
- Add product: Specific dosage varies by alkalinity level, spa size, and product instructions, but a typical starting point is 1 ounce (about 2 tablespoons) per 400 gallons to increase alkalinity by 10 ppm.
- Apply directly into spa water with jets running for even distribution.
- Wait at least 10–30 minutes, then retest; repeat if needed until target alkalinity is reached.
Additional Notes
- Increasing alkalinity with sodium bicarbonate may also raise pH slightly.
- Avoid large additions at once; gradual adjustment prevents overshooting target levels.
- Proper alkalinity protects hot tub components and helps sanitizer work effectively.
- Store chemical dry and tightly sealed.
St. Cyr Alkalinity Increase 25lbs is ideal for routine spa maintenance, especially after fresh fills or water changes, where alkalinity tends to drop.
