How to Vacuum Pool

When Do You Need to Vacuum Your Pool?

Regular vacuuming removes dirt, debris, and fine sediment that settles on the pool floor and walls. Skimmers and filters handle a lot, but they can't catch everything, especially the fine particles that sink and sit on the surface.

As a general rule, most residential pools benefit from vacuuming at least once a week during the swimming season. You may need to vacuum more often after:

• Heavy rain or storms, which wash debris and dirt into the pool
• High wind events that blow leaves and dust across the water
• A period of heavy pool use
• Any visible algae growth or cloudiness on the pool floor

In Auckland's climate, pools can pick up debris quickly, particularly in autumn and after summer storms. Staying on top of vacuuming makes the rest of your pool maintenance easier.

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What You'll Need

Before you start, gather the following equipment:

• Vacuum head, attaches to the pole and sits on the pool floor
• Telescopic pole, extends to reach the full length and depth of your pool
• Vacuum hose, connects the vacuum head to the skimmer or dedicated vacuum port
• Skimmer basket, already fitted in your pool; remove and clean it before vacuuming
• Leaf rake or net, useful for clearing large debris before you vacuum
• Water testing kit, good practice to check your water chemistry before and after

Some pools have a dedicated vacuum port on the pool wall. If yours does, you'll connect directly to that rather than through the skimmer. Check your pool's setup before you begin.

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Step-by-Step: How to Vacuum Your Pool

Step 1, Clear the surface first

Use a leaf rake or skimmer net to remove any floating leaves and large debris. If you vacuum over large debris, it can clog the hose or get drawn into the filter, reducing efficiency.

Step 2, Clean the skimmer basket

Remove the skimmer basket and empty it. A blocked basket restricts water flow and reduces suction. Rinse it out and replace it before connecting your vacuum.

Step 3, Assemble the vacuum

Attach the vacuum head to the telescopic pole. Connect one end of the vacuum hose to the vacuum head. Make sure all connections are firm, loose fittings will let air in and reduce suction.

Step 4, Prime the hose

This step is important. Before connecting the hose to the skimmer or vacuum port, you need to remove the air from the hose. To do this:

1. Hold the free end of the hose over a return jet (the fitting that pushes water back into the pool)
2. Let the water flow through the hose until bubbles stop coming out of the vacuum head end
3. Once the hose is full of water, keep the free end submerged and move it to the skimmer or vacuum port

Skipping this step means air gets into the pump, which can cause it to lose prime and reduce suction significantly.

Step 5, Connect to the skimmer or vacuum port

If connecting through the skimmer, place the vacuum plate (also called a skim-vac plate) over the skimmer basket, then attach the hose to it. This directs suction through the hose rather than the skimmer basket.

If your pool has a dedicated vacuum port, connect the hose directly to it.

Step 6, Check your filter setting

For routine vacuuming, your filter should be set to Filter mode. This passes the vacuumed water through the filter media, trapping debris.

If your pool has a significant amount of fine sediment or algae on the floor, for example, after treating a green pool, you may want to set the filter to Waste mode. This bypasses the filter and sends the dirty water directly out to waste, which prevents the debris from circulating back into the pool. Be aware that vacuuming to waste will lower your water level, so top up the pool afterwards.

Step 7, Vacuum the pool floor and walls

Lower the vacuum head to the pool floor. Move it slowly and steadily across the surface in overlapping straight lines, similar to mowing a lawn. Avoid quick, jerky movements, which stir up debris rather than picking it up.

Work from the shallow end to the deep end, or from one side to the other. The key is to be methodical so you don't miss patches.

Pay extra attention to:

• Corners and steps, where debris tends to collect
• Areas near return jets, where circulation can push sediment
• Any visible staining or algae patches on the walls

Step 8, Disconnect and backwash

Once you've finished, disconnect the hose from the skimmer or vacuum port. Remove the vacuum head and hose from the pool.

If you have a sand or DE filter, backwash it after vacuuming to flush out the debris you've collected. If you have a cartridge filter, check whether it needs rinsing, a heavy vacuuming session can load up the cartridge quickly.

Step 9, Check and rebalance your water

Vacuuming, especially to waste, can affect your water chemistry. Test your water after vacuuming and adjust as needed. This is particularly important if you've topped up the pool with fresh water.

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Common Mistakes to Avoid

Moving the vacuum head too quickly

Rushing through the process stirs up fine sediment rather than collecting it. Slow, steady passes give the suction time to work properly.

Skipping the hose-priming step

Air in the hose causes the pump to lose prime and reduces suction. Always prime the hose before connecting it to the skimmer or vacuum port.

Vacuuming over large debris

Leaves and large debris can block the hose or overwhelm the filter. Clear the surface with a net first.

Not cleaning the skimmer basket beforehand

A blocked basket restricts flow. It takes less than a minute to empty, don't skip it.

Forgetting to backwash afterwards

The debris you've vacuumed is now sitting in your filter. Backwashing or rinsing the filter after a vacuuming session keeps it performing well.

Vacuuming algae on Filter mode

If you're dealing with a significant algae problem, vacuuming to Filter mode can push algae spores back through the filter and into the pool. Switch to Waste mode for algae clean-ups, and top up the water level afterwards.

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When to Get Help

Vacuuming is a straightforward task for most pool owners. However, there are situations where it's worth calling in a professional:

• You're losing suction and can't identify why, this could point to a pump issue, a blocked impeller, or a problem with the filter that needs diagnosis
• The pool floor has heavy algae or sediment that won't clear, a persistent problem may need a full chemical treatment alongside the vacuuming
• Your pump loses prime repeatedly, this is a sign of an underlying equipment issue, not a vacuuming technique problem
• You're unsure about your filter settings, using the wrong setting can make the problem worse, particularly with algae

Sparkling Pools provides on-site pool servicing across Auckland. If your pool isn't responding to regular maintenance, a technician can assess the equipment and water chemistry in person.