I need a new filter as old sand filter died - valve and lateral gone. I'm keen on the Pentair Quad DE but the pool guy is dead against it as he says where I am in north TN surrounded by trees and with the pool only open half the year that the Quad will not work as well as a sand filter. He told me the pool will be green on opening it and I will never manage to get it clear with the Quad as he said I will be constantly trying to clean the cartridge and will need spares to use but with a sand filter all I need it to backwash it.
Is he right? I have used a sand filter happily but like the idea of the cartridge and DE.
Please can anyone comment on this topic