1st Direct SALES HOTLINE 0800 328 4150 - TECHNICAL HOTLINE 01747 839 608

A Family Run Business trading for 38 years aiming to provide 100% Customer Satisfaction

Recommended Chemical Dosage for Swimming Pool Owners

Treatment
Always follow the directions on the product label.
Per 1,000 Gallons Per 100 Cubic Meters Ideal Value/Range
Chlorination
Always maintain correct free chlorine residual in the water.
Dose in accordance with test kit readings.
Granules: To add 1 ppm chlorine. 850gm 1.800kg Indoor Pools 1-2ppm
Tablets: Weekly requirement.
(Private pools only)
1 Tablet 2 Tablets Outdoor Pools 3ppm
Liquid: To add 1ppm chlorine. 400ml 850ml 3-5ppm
Bromination
Always maintain correct total bromine residual in the water. Adjust brominator in accordance with test kit readings
    Indoor Pools
3-5ppm
Outdoor Pools
4-6ppm
pH Correction
To increase pH:
Add Dry Alkali daily until correct pH established.
1lb 1kg 7.2-7.6
To decrease pH:
Add Dry Acid daily until correct pH established.
1lb 1kg 7.2-7.6
Total alkalinity correction
To increase:
Alkalinity Increaser to add 15ppm
3 lbs 3 kgs 100-150ppm
To decrease:
Dry Acid to reduce by 15ppm
2 lbs 2 kgs 100-150ppm
Total Dissolved Solids
To decrease:     Less than
Replace part of pool water with fresh     1500ppm
Calcium Hardness
To increase:
Calcium Chloride to raise 15ppm
2 lbs 2 kgs 100-500ppm
To decrease:
Replace part of pool water with fresh.
     
Chlorine Stabilisation
To stabilise:
Cyanuric Acid to add 30ppm
3 lbs 3 kgs 20-100ppm
To reduce:
Replace part of pool water with fresh
     
Dechlorination
Before emptying the pool or as necessary to lower chlorine residual.
To dechlorinate:
Neutraliser to reduce by 2 ppm
1 llb 1 kg  
To polish water.
After every backwash, or as necessary to
improve water quality. Add Liquid Clarifier.
55 mls 120 mls  
Bishta, Certikin, Plastica and SCP