How to Clean a Pool: A Step-by-Step Guide
The right order to skim, brush, vacuum, and clean the filter, plus how often each step needs doing. A repeatable cleaning routine that keeps water clear with minimal effort.
Cleaning a pool is not one task, it's a short sequence of tasks that work best in a specific order. Do them out of order and you make more work for yourself: vacuum before you brush and you'll stir up settled dirt; clean the filter last and you'll clog it with everything you just knocked loose. This guide walks the sequence top to bottom, tells you how often each step actually needs doing, and separates the quick weekly pass from the occasional deep clean.
What you'll need
- A skimmer net (a flat leaf skimmer or a deeper leaf rake for heavy debris).
- A pool brush sized to your surface: nylon bristles for vinyl and fiberglass, stainless or a mix for plaster and gunite.
- A manual vacuum head and telescoping pole, or a robotic cleaner.
- A test kit or strips, so you can check the water once the pool is physically clean.
The order to clean in
Work from the top of the water down to the filter. Each step sets up the next one.
Step 1: Skim the surface
Start by netting floating leaves, insects, and debris off the surface. Doing this first matters because anything floating will sink within a day or two, and debris on the floor is much harder to remove than debris on top. Skimming also lightens the load on your skimmer baskets and filter before you stir anything up.
Step 2: Empty the baskets
Pull and empty the skimmer basket (or baskets) and the pump strainer basket. A basket that's even partly full restricts flow, which weakens both circulation and the suction you're about to rely on for vacuuming. Do this every week regardless of how full they look.
Step 3: Brush the walls and floor
Brush the walls, steps, waterline tile, and especially the dead spots where water barely circulates, such as behind ladders and in corners. Brushing lifts settled dirt and, more importantly, physically breaks up algae in its early, invisible stage before it can bloom. Brush toward the main drain so the vacuum or filter can pick up what you've loosened. This is the single most skipped step in pool cleaning and the one that prevents the most problems.
Step 4: Vacuum the floor
With debris brushed loose and suspended, vacuum the floor. A manual vacuum connected to your skimmer or a dedicated suction line lets you cover the whole floor deliberately; a robotic cleaner does it for you on its own cycle. Go slowly, since moving the vacuum head fast just re-suspends dirt without collecting it. If the water is very dirty, vacuum to waste (bypassing the filter) if your system allows, so you don't overload the filter.
Step 5: Clean the filter as needed
Cleaning stirs up and captures a lot of material, so the filter is the last thing to check. Look at the pressure gauge: if it has climbed 8 to 10 PSI above its clean baseline, backwash a sand or DE filter, or rinse a cartridge. If it's still near baseline, leave it, since cleaning a filter more often than needed shortens media life without any benefit.
Step 6: Test and balance the water
Now that the pool is physically clean, test pH, free chlorine, and alkalinity and adjust as needed. Cleaning and chemistry are two halves of the same job: clear water needs both debris removed and sanitizer in range. A pool that looks clean but tests low on chlorine is one warm day away from turning cloudy.
How often each step needs doing
| Task | Frequency |
|---|---|
| Skim the surface | Every day or two |
| Empty baskets | Weekly |
| Brush walls and floor | Weekly |
| Vacuum floor | Weekly, or as debris settles |
| Check and clean filter | When pressure rises 8-10 PSI |
| Deep-clean filter media | Monthly to seasonally |
| Clean the waterline tile | As scum builds |
Note: A robotic cleaner covers the skim, brush, and vacuum steps on most pools, which is why it's the single upgrade that makes DIY cleaning realistic for busy owners. You still empty its filter basket and handle the waterline and the actual filter, but the daily grind of vacuuming disappears.
The deep clean: when the routine isn't enough
Sometimes a pool needs more than the weekly pass. After a storm dumps organic debris, at spring opening, or when algae has taken hold, you'll do a heavier version: skim thoroughly, brush every surface hard, vacuum to waste, shock the water to break down organics and kill algae, run the filter continuously until the water clears, then clean the filter again once it does. Cloudy water after shocking is normal and usually clears within a day or two of continuous filtration. Our green pool to clear guide covers the full algae-recovery sequence.
If you keep the weekly routine consistent, the deep clean stays rare. The whole point of cleaning little and often is that you almost never have to clean a lot at once. Skimmer's task templates and reminders keep the weekly steps from slipping, which is what keeps the big jobs off your calendar.
Frequently asked
How often should I clean my pool?
Should I brush or vacuum first?
Do I need to vacuum if I have a robotic cleaner?
Why is my pool still cloudy after I cleaned it?
Can I clean the pool while the pump is off?
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