I'm living in Ireland with a pool in France which is used mid June to mid September max. It is an in ground tiled pool of about 80 cubic metres. I use a sand filter. I have in the past got neighbour to throw in a couple of multifunction tablets once a week while I'm away and less between November and March with pump set for two hours a day then. I am not there except for the summer months. For the past two years I have switched off the pump in September and returned in June and dealt with a green pool. The first year I was to have work done which didn't happen and the second year after the work was completed the pool was refilled but was green when I arrived.
After clearing the frogs etc I didn't find the task too difficult to bring the pool right back with a few days shocking the pool and a bit of brushing. I think the initial fear was more daunting the actual task.
I am now thinking that this is the way to go for me in future years throw a winter cover over the pool and walk away. Freezing is not a problem but I would probably cover the pump and pipes with a fiberglass blanket to be safe. There are a lot of benefits for me in this, don't need anyone to look in to put in chemicals, top up water etc. No power or chemicals required for 9 months and I know what to expect when I arrive.
Is there a down side to this plan. Will algae damage tiles or equipment. Will it get more difficult to deal with or have I been lucky as some seem to have great difficulty getting to terms with algae? Does anybody else do this or what do people think.