Gidday Dan
According to the nice tech bloke at Davey, one should run the pump enough to change the water once every 24 hours. The pump on ours can manage to do that in slightly less than 4 hours, so I run it for 4 hours a day, with a little less in winter (3 hours).
IME, pool shops must get a cut from the electricity companies, because they all say to run the filtration pump 8-10 hours a day, regardless of the size of the pool and the size of the pumps - which is why I rang Davey up in the first place ...
The salt chlorinator controller gets turned up to 100% in summer, and back to 50% for the other 8-9 months of the year. Our pool is heated by a solar heater, which has a separate pump. On average, I chuck about 6x 20 kg bags of salt into ours each year, sometimes a bit more. Pool salt is far cheaper at Bunnings than at your local pool shop ... I buy a litre of copper and organic algaecide and chuck that in about once a year as well. If it is a concrete pool, it is important to keep the calcium levels right, otherwise the calcium in the concrete will leach out into the pool water, usually destroying the tiling at the same time ...
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Our pool is small (45,000 litres) and both pumps are well and truly over rated size wise for a pool of this size, as is the solar water heater. Bloody needs to be in Melbourne!
Hope this is some help.