Always test the water with test strips and use the readings to see if the water needs to be chemically treated and what parameters to look for. We recommend using an INTEX saltwater system, which means you won't need to buy chemically produced chlorine, but will enjoy the gentle natural chlorine produced by salt electrolysis. For further questions about pool chemicals, contact your local pool chemical dealer and let them know how many litres of water your pool can hold. They will recommend the most appropriate type of products and dosage.