Description
Long-lasting pool sanitation without CYA buildup
Poolife NST Prime Cal Hypo Chlorine Tablets provide slow-dissolving chlorine sanitation for clear, swim-ready pool water. Their calcium hypochlorite formula does not add cyanuric acid (CYA), helping prevent CYA buildup and chlorine lock.
The 4.5 lb size offers a smaller package option for pool owners choosing NST Prime tablets. Add tablets as needed based on pool size and usage, and test regularly to maintain 1–4 ppm free chlorine.
Sanitize without adding CYA
NST Prime uses calcium hypochlorite to sanitize pool water without adding cyanuric acid. Avoiding CYA buildup helps reduce the risk of chlorine lock.
Slow-dissolving protection
The octagon-shaped tablets are formulated to dissolve slowly, providing long-lasting sanitation and days of hands-free protection.
Choose a delivery method
Use the tablets in an NST Cal Hypo feeder, an NST Floater, or directly in the skimmer. Any automatic feeder used must be specifically designed for Cal Hypo tablets.
Keep water clear and balanced
Test pool water regularly and maintain 1–4 ppm free chlorine. Add tablets as needed based on pool size and usage, following the container label.
Key Features and Benefits
- Long-lasting sanitationSlow-dissolving Cal Hypo tablets provide extended pool sanitization.
- No CYA buildupSanitizes without adding cyanuric acid that can contribute to chlorine lock.
- Days of protectionThe slow-dissolving formula is designed for days of hands-free protection.
- Clear pool waterHelps keep pool water clear and swim-ready.
- Flexible applicationUse in an NST Cal Hypo feeder, NST Floater, or directly in the skimmer.
- Designed for Cal Hypo feedersUse only in an automatic feeder specifically designed for calcium hypochlorite tablets.
Product Details
| Product Detail | Information |
|---|---|
| Brand | Poolife™ |
| Product Name | NST Prime Cal Hypo Chlorine Tablets |
| Size | 4.5 lb |
| Manufacturer SKU | 22427 |
| UPC | 073187224279 |
| For Use In | Swimming pools |
| Product Type | Chlorine sanitizer |
| Form | Slow-dissolving octagon-shaped tablets |
| Active Ingredient(s) | Calcium hypochlorite (Cal Hypo); percentage: Not specified in reviewed product details |
| Dosage | Maintain 1–4 ppm free chlorine; dose per gallons: Not specified in reviewed product details |
| Treats/Coverage | Not specified in reviewed product details |
| Stabilized (CYA) | No; the product sanitizes without adding CYA |
| Wait to Swim | Not specified in reviewed product details |
| Compatible With | NST Cal Hypo feeder, NST Floater, or direct skimmer application. Do not use in feeders intended for Trichlor tablets. |
| Storage | Store in a cool, dry place. Shelf life stated as up to 2 years when stored this way. |
| Hazard/Shipping class | Not specified in reviewed product details |
| Shipping Weight | About 5.0 lb |
How to Use
- Test the water: Test pool water regularly before adjusting tablet use.
- Choose an application method: Use an NST Cal Hypo feeder, NST Floater, or place tablets directly in the skimmer.
- Use the correct feeder: For automatic dosing, use only a feeder specifically designed for Cal Hypo tablets, such as the NST Feeder.
- Maintain free chlorine: Keep free chlorine in the 1–4 ppm range.
- Adjust as needed: Add tablets as needed based on pool size and usage, starting with fewer and increasing as needed.
- Store properly: Store tablets in a cool, dry place.
Important Compatibility and Safety Notes
Compatibility and mixing
Use in an NST Cal Hypo feeder, an NST Floater, or directly in the skimmer. Automatic chlorinators must be specifically designed for Cal Hypo tablets; do not use these tablets in feeders intended for Trichlor. Never mix Cal Hypo tablets with Trichlor or Dichlor tablets in the same feeder, skimmer, or floater because a dangerous chemical reaction may occur. Chlorine products are not for biguanide/PHMB pools.
Safety First
Never mix these tablets with Trichlor or Dichlor tablets, including in the same feeder, skimmer, or floater. Use only in a feeder designed for Cal Hypo tablets. Store in a cool, dry place. Protective equipment requirements: Not specified in reviewed product details. Keep out of reach of children and pets, and always read and follow the full label directions and precautions on your container.
Why Choose Poolife NST Prime?
Poolife NST Prime provides long-lasting Cal Hypo sanitation without adding CYA, helping avoid CYA buildup and chlorine lock. Its slow-dissolving tablets can be used with specified NST delivery options or directly in the skimmer.
Ideal For
- Pool owners seeking chlorine sanitation without added CYA
- People looking for slow-dissolving tablets for ongoing sanitation
- Pool owners who want to use an NST Cal Hypo feeder or NST Floater
- Pool owners who prefer direct skimmer application
- Those monitoring free chlorine and adjusting tablet use as needed
Frequently Asked Questions
How often should I use NST Prime tablets?
Add tablets as needed to maintain 1–4 ppm free chlorine. The amount and frequency depend on pool size and usage, so test the water regularly.
Can I use NST Prime in a saltwater pool?
Yes, when supplemental chlorine is needed. Monitor water balance closely.
What is the shelf life?
When stored in a cool, dry place, the tablets remain effective for up to 2 years.
How are Cal Hypo tablets different from Trichlor tablets?
Cal Hypo tablets sanitize without adding CYA. Trichlor tablets contain CYA, which can build up and reduce chlorine effectiveness over time.
Can I use NST Prime in any automatic chlorinator?
No. Use only an automatic feeder specifically designed for Cal Hypo tablets, such as the NST Feeder. Do not use them in feeders intended for Trichlor tablets.
How many tablets should I add?
The amount depends on pool size, temperature, and bather load. Test the water first, start with fewer tablets, and adjust as needed to maintain 1–4 ppm free chlorine.
Can I mix these tablets with other chlorine products?
No. Never mix Cal Hypo tablets with Trichlor or Dichlor tablets in the same feeder, skimmer, or floater. Mixing may cause a dangerous chemical reaction.
Can these tablets be used directly in the skimmer?
Yes. The product directions list direct skimmer placement as an application method. Do not mix them with other types of chlorine in the skimmer.