Last year we went for a long break back to the UK leaving precise instructions on how to keep the pool and water clean. When we arrived back the water was clean and all looked good until I turned on the circulation pump/filter. I soon realised that the person who was cleaning the pool had not backwashed the filter and dirty water was entering the pool via the filter.
After many attempts at backwashing and refilling the pool I got the water to an acceptable state of cleanliness albeit not sparkling like it used to be but every time I topped up the Chlorine level the pool water went cloudy. I have done a full test today with the following results: -
FC 5, CC 3.5, TC 8.5, pH 7.8 ( I have not had to add any Soda Ash for a long time?) T/A 100, CH 300, CYA 30
The sand filter has been operating for 5 years, is it possible the sand in the filter needs changing?
Could the cloudy water be dust particles suspended in the water?
Any advice would be gratefully received as long as it is not empty and refill the pool as that would be extremely expensive, water is not cheap here.
Best wishes to all