Not sure if this is the best forum to post in but here it is :
Due to Covid we have just been able to return to south of France to our second home after closing the pool mid October 2019 but we are only here until start of November (we usually leave mid October and the pool has to be closed above 59F). The in ground pool (25,500 gallons) has been closed under a domed perspex pool cover for nearly a year (It has been hot in France this year so I can know the water temperature has exceeded 93F).
The water currently looks clear, there are no noticeable things swimming around in the pool, presumably they have all died and or left the pool as there are usually tadpoles, etc. in the green pool when it is opened in May. The readings are as follows: FCL 0.28, TCL 0.41, PH 8.1, TA 140, CH 155, CYA 19, Temp 83F.
The algae has coated the bottom and looks brownish and a rusty colour on the side walls.
My confusion is that the pool looks stable albeit a mess - should I disturb this equilibrium? Or will it be an even bigger headache next May??
It usually takes about 120 litres of 9.6% bleech to clear it every May, which is an acceptable cost if I am actually going to be using the pool for 5 months.
The pool does not have a liner insert and is just painted over something, don't know what but I am not too concerned over blemishes to the surface as long as it remains watertight.
I need some advice on my best options from the TFP experts that have been in this situation.
Thanks, Bob
Due to Covid we have just been able to return to south of France to our second home after closing the pool mid October 2019 but we are only here until start of November (we usually leave mid October and the pool has to be closed above 59F). The in ground pool (25,500 gallons) has been closed under a domed perspex pool cover for nearly a year (It has been hot in France this year so I can know the water temperature has exceeded 93F).
The water currently looks clear, there are no noticeable things swimming around in the pool, presumably they have all died and or left the pool as there are usually tadpoles, etc. in the green pool when it is opened in May. The readings are as follows: FCL 0.28, TCL 0.41, PH 8.1, TA 140, CH 155, CYA 19, Temp 83F.
The algae has coated the bottom and looks brownish and a rusty colour on the side walls.
My confusion is that the pool looks stable albeit a mess - should I disturb this equilibrium? Or will it be an even bigger headache next May??
It usually takes about 120 litres of 9.6% bleech to clear it every May, which is an acceptable cost if I am actually going to be using the pool for 5 months.
The pool does not have a liner insert and is just painted over something, don't know what but I am not too concerned over blemishes to the surface as long as it remains watertight.
I need some advice on my best options from the TFP experts that have been in this situation.
Thanks, Bob