Yes Mark, I agree and I said if the filtration was good enough. I don't want to get into the area of colloids yet but the point was more that continuous running of the filtration but at a slower rate will improve the the water quality by removing more suspended solids because they are suspended and so can be skimmed and filtered and not just sinking to the bottom once the water has calmed. I have vaccuumed too many pools only to see small clouds created by dirt if you move too quickly or make sudden moves. Running the sysytem continuously has removed that problem. That said, I wonder if removing too much from the water would cause a greater loss of chlorine to photodegredation as the suspended matter may shield chlorine from the sun's UV in the same way as bacteria and algae can be shielded from chlorine as stated in your second link.

It is a fact that DE can remove Ocyst of Gardia and Crypto providing the grids are intact but DE is just a mechanical filter to go to the next level we need adsorption to draw particles to the surface of the filter media.

As you have a large cartridge filter and a good sized 2 speed pump, I would be interested in your flow rate and system pressure at normal running conditions if you wouldn't mind passing on that information please?
Regards
John