Note: If using a chlorinator the ppm required will vary slightly depending on the make and design. Low salt concentration below 2000 PPM will render the system ineffective as the salt concentration is too weak. High salt chlorination above 5000 PPM may cause corrosion to pool fixtures.
How many litres is your pool volume: 20000 litres (5283.44 US Gallons)
25kg bags of salt required: 2.4 Bags