How do you manually vacuum a pool (step-by-step for dummies)?

[plays10s]

Hi - We've had our pool a year, and I have been using the robotic cleaner. Our pool company gave me the manual vacuum but did not show me how to use it. Do I first put in time out mode? Or No? Do I turn the main skimmer thing off? If I put my vacuum hose into one of the three holes that are seen in the picture, where does the debris go? There are no leaves; it's just maybe dust or sand that I'm wanting to get up and mainly from the hot tub since it has never been vacuumed? Could someone please provide a step-by-step guide. I have a Pentair system.

Thanks,
LaDonna

 

[ajw22]

When vacuuming debris gets sucked through your pump into your filter.

To clean dust and sand from your hot tub turn it on in spa mode so your system is filtering only the spa water. Keep the spa on for an hour or two or three and brush the surfaces every half hour or so to stir up the debris and it will get filtered out. If you have spa jets or a blower you can use that to stir up the water. This is an easier way to filter out the spa.