Crystalline Chlorine 4kg | Sodium Di-Chlor | Pool & Spa Sanitiser

The go-to chlorine for NZ pool and spa owners. Crystalline Chlorine is a fast-dissolving Sodium Di-Chlor granular sanitiser that keeps your pool or spa water crystal clear, bacteria-free, and safe to swim in, without the fuss of pre-dissolving or complicated dosing.

Whether you're shocking a green pool back to life or maintaining a pristine spa, this stabilised formula works fast and stays effective even under the harsh NZ sun.

Product Specifications

Available Sizes

• 1kg Pail - ideal for spas or top-up dosing.
• 2kg Pail - great for smaller pools or regular spa maintenance.
• 4kg Pail (this product) - the most popular size for pool owners.
• 10kg Pail - best value for large pools or frequent use.

Dosing Guide

Swimming Pools - Shock Dosing:

• Add 500g per 20,000L of pool water
• Raises chlorine by approximately 1-2 ppm
• Apply in the evening or early morning for best results
• Run pump for at least 4 hours after dosing

Spa Pools - Initial Fill:

• Add 80g per 1,000L of spa water on first fill
• Maintenance: 1 teaspoon per person per use, or 1 tablespoon per week if used infrequently
• Always test water with strips before and after dosing

Dosage Reference Table

Use in Combination with Trichlor Tablets

Crystalline Chlorine works exceptionally well alongside Trichlor Tablets for a complete pool sanitisation system. Use Trichlor tablets in a floating dispenser or feeder for slow-release, ongoing chlorination, then use Crystalline Chlorine for shock dosing after heavy use, rain, or when chlorine levels drop quickly. Together they give you consistent baseline protection plus fast-acting top-up capability.

Safety and Storage

• Store in a cool, dry place away from direct sunlight
• Keep away from children and pets
• Do not mix with other pool chemicals
• Always wash hands after handling
• Refer to product label for full safety information

Recommended Accessories

• Trichlor Tablets 5-Pack (1kg) - slow-release ongoing chlorination, pairs perfectly with Crystalline Chlorine.
• Trichlor Tablets 20-Pack (4kg) - best value for regular pool owners.
• 5-in-1 Test Strips - test chlorine, pH, alkalinity, and hardness in seconds.
• Dolphin X25 Robotic Pool Cleaner - keep your pool clean with zero effort.

Frequently Asked Questions

Q: What's the difference between Sodium Di-Chlor and Trichlor?
A: Sodium Di-Chlor (Dichlor) dissolves faster and is pH-neutral, making it ideal for spas and regular pool dosing. Trichlor is slower-dissolving and better suited to tablet feeders for ongoing pool maintenance. Many pool owners use both together for best results.

Q: Can I use this in a saltwater pool?
A: Yes - Crystalline Chlorine can be used to shock a saltwater pool when the salt cell isn't keeping up, such as after heavy rain or high bather load.

Q: How often should I shock my pool?
A: Shock weekly during summer or after heavy use, rain, or if water looks cloudy. For spas, dose after every use or at least weekly.

Q: How long after dosing can I swim?
A: For pools, wait until chlorine levels drop to 1-3 ppm (typically 4-8 hours). For spas, wait until levels drop to 3-5 ppm. Always test with test strips before swimming or soaking.

Q: Can I use this with a robotic pool cleaner?
A: Yes - shock dose your pool as normal. Run your robotic pool cleaner after the chlorine has circulated and levels have returned to the safe range.

Q: Is this safe for fibreglass pools?
A: Yes - Sodium Di-Chlor is safe for concrete, fibreglass, and vinyl liner pools when used at the correct dosage.

Pickup and Delivery

Perfect Pools Service Warehouse - 15C Douglas Alexander Parade, Albany, Auckland
Hours: Mon-Fri 9am-4pm | Sat 10am-2pm
NZ-wide delivery available. Charges calculated at checkout.
Questions? Email perfectpoolsnz@gmail.com or visit our contact page.