multiple pumps

I recently moved into a home and of course finding a number of huge issues that the previous pool "service" company should have fixed years ago. Clean filter, remove broken baskets, cracked O rings, and so on. I suspect they were taking advantage of the previous owner who likely did not know...

I have 2 pumps (complete with individual filters, ozone, UV etc.) at my holiday home. The reason for the double up is the size of the pool (110,000 litres). I have been running these for 12 hours concurrently for the last couple of years and the pool looks great. I increase this to about 16...