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I have just been to Spain for 10 days and left my 18 year old daughter in charge of the hot tub. Although she has put chlorine in the tub after her and her friends have used it, it was obviously not enough.Water was very cloudy and difficult to see the bottom. There was also a bit of dirty looking foam. I had thought of just dumping the water considering that it was almost 3 months old, but took up the challenge to see if I could get it back.Firstly I put two tea spoons of chlorine in (not enough I know) and this was soon used up. Put another 4 in which was used up by the next day. Then put 5 in plus 3 tablespoons of non chlorine shock, 100ml of clarifier and 25ml of no foam. Run the pumps for 40 minutes and its usual 12 hour filtration.Next day the water smelt fresh and was crystal clear. I am amazed how you can turn bad water into good.
I have just been to Spain for 10 days and left my 18 year old daughter in charge of the hot tub. Although she has put chlorine in the tub after her and her friends have used it, it was obviously not enough.
On days like that where the spa gets alot of use, try and hit it hard with chlorine after everyone is done going in. Might save you having to clear it back up.