Technical Info
Calcium Hardness Increaser 25kg Bucket
Blue Horizon
0 Reviews
£40.29
INC VATDiscontinued
Not available to be ordered, and never will be available to be ordered again
Get it 20/02/2026Order by 20/02/2026 00:00
LID: 80745
Product Details
Swimming pool calcium hardness levels should be maintained at a minimum of 200mg/l (ppm) to ensure that the pool and equipment are protected. Calcium Hardness Raiser is a calcium flake which rapidly increases calcium hardness to the desired level.
Instructions
- Before applying this product it should be pre-dissolved in a clean plastic container at a maximum rate of 100g of product to 10 ltrs of cold fresh water. Stir well to ensure the product is fully dissolved. Repeat application to achieve the total dose required ? see table below for dose rates. It is recommended that the total treatment is split into three equal applications with a minimum of 8 hours between each.
- After pre-dissolving add the resulting solution to the pool near the inlets with the filtration system in operation.
- Following the application the pool water may become cloudy so keep the filtration pump running continuously until it clears.
- After treatment check the pH level and if necessary adjust.
| Pool Volume | Dose Rate To increase Calcium Hardness | |||
|---|---|---|---|---|
| M3 (Ltrs) | Gallons | 10mg/l | 20mg/l | 50mg/l |
| 4.55 (4,545) | 1,000 | 68g | 136g | 340g |
| 11.36 (11,364) | 2,500 | 170g | 340g | 850g |
| 22.73 (22,730) | 5,000 | 340g | 680g | 1.70kg |
| 45.45 (45,455) | 10,000 | 680g | 1.36kg | 3.40kg |
Technical Specifications
| Discontinued Listing | 1 |
| Sash 1 | blue horizons |
| Sash 2 | 25kg |
| Sash 3 | hardness increaser |
| Sash 4 | for hot tubs & pools |
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