we have an outside SWG pool which has been used all summer without too many issues. We are now no longer at the house and the pool has been unattended for 3 weeks although pumps etc have all been left running. The "pool man" popped around yesterday to inform me that as the weather has been unseasonably hot, the pool has gone green. Last year we had no issues with it remaining clean until we returned to close it down in mid October (and the weather was not dissimilar)
Q1: As we are no longer using it, does it make any sense shocking it back to clean and then maintaining it until mid October when the water temp will have dropped to below 15C? I ask this because obviously it will require a certain level of cost to do so and seems a waste if this operation is to be carried out again in the Spring. If I leave it green, will it be that much harder to get it started and could it potentially stain the liner?
Q2: I am assuming that the Chlorine generator is not doing it's job, as the same scenario last year did not result in a green pool. Is there any simple way to assess how well the generator is working?
Any thoughts would be much appreciated.