Blue Horizons Calcium Hardness Raiser 5kg - USE CHPLUS5OL / CHPLUS1OL as alternative
Blue Horizons Calcium Hardness Raiser is a premium water treatment product designed to increase the calcium hardness levels in your swimming pool or spa. Maintaining the correct calcium hardness is essential for preventing damage to pool surfaces and equipment, ensuring a comfortable swimming environment, and prolonging the life of your pool or spa. Calcium Hardness Raiser is a calcium flake which rapidly increases calcium hardness to the desired level.
Swimming pool calcium hardness levels should be maintained at a minimum of 200mg/l (ppm) to ensure that the pool and equipment are protected.
Key Features:
- Effectively raises calcium hardness
- Prevents corrosion and etching
- Reduces scale formation
- Easy to use
- Compatible with all pool types
- High quality ingredients
Ideal for use in:
- Swimming pools
- Spas and hot tubs
- Water balancing.
Size: 5kg
Sku: CHPLUS05BH
| Calcium Hardness Dosing Rates | |||||||
| Pool Volume | To Increase Calcium Hardness by: | ||||||
| Litres | Gallons | 10 mg/l | 25 mg/l | 50 mg/l | |||
| 4,545 | 1,000 | 68g | 170g | 340g | |||
| 11,364 | 2,500 | 170g | 425g | 850g | |||
| 22,727 | 5,000 | 340g | 850g | 1.7kg | |||
| 45,455 | 10,000 | 680g | 1.7kg | 3.4kg | |||
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.