How to Vacuum a Pool Correctly

Introduction

Vacuuming a pool seems like a simple task, but doing it correctly makes all the difference between crystal-clear water and a pool that never gets truly clean. Many pool owners make basic mistakes that not only reduce vacuuming effectiveness but can damage equipment or worsen existing problems.

Vacuuming is one of the most important maintenance tasks. While the skimmer and filter deal with particles in suspension, only vacuuming removes the dirt that accumulates on the bottom and walls – sand, leaves, insects, dead algae and other debris that settles daily.

In Margem Sul, with the characteristic pine trees of areas like Aroeira and Verdizela, and the sand blown by wind in coastal areas, regular vacuuming is even more critical. In this article, we explain how to vacuum your pool correctly, what equipment to use, and how to avoid the most common mistakes.

Types of Pool Vacuums

Manual Vacuum

The traditional and most versatile method:

Manual system components:

• Vacuum head
• Telescopic pole
• Vacuum hose
• Skimmer adapter or direct connection

Ideal for:

• Intensive spot cleaning
• Hard-to-reach areas
• Heavy debris removal
• Vacuuming to waste (algae, sand)

Automatic Hydraulic Vacuum

Works with system pressure:

Hydraulic types:

Robotic Vacuum

The premium option:

Robot advantages:

• Doesn't use the filtration system
• Own filter (doesn't overload pool filter)
• Programmable (works while you're away)
• Cleans floor, walls and waterline
• Some models clean stairs

How to Vacuum Manually: Step by Step

Preparation

Before starting:

1. Brush the walls and floor

• Loosen adhered dirt
• Let settle for 15-30 minutes
• Prior brushing greatly increases effectiveness

1. Remove large debris

• Use the leaf skimmer net
• Remove leaves, large insects, objects
• Large debris can clog the system

1. Check the water level

• Should be at mid-skimmer
• Low level = risk of air intake

1. Clean the pre-filter and skimmer basket

• Clean system = better vacuuming
• Check filter pressure

Equipment Setup

Correct procedure:

1. Connect the head to the pole

• Tighten well so it doesn't detach during use
• Check the head is in good condition

1. Connect the hose to the head

• Use clamp if necessary
• Check there are no holes in the hose

1. Fill the hose with water (prime)

• Place the head in the water
• Hold the other end near the return jet
• Let water push the air out
• When water comes out (no bubbles), it's ready

1. Connect to the skimmer

• Remove the skimmer basket
• Connect adapter or directly
• Keep hose submerged during connection

Vacuuming Technique

How to vacuum effectively:

Recommended order:

1. Start from the deepest area
2. Work in parallel strips
3. Overlap each pass ~10cm
4. Finish on walls (bottom to top)
5. Waterline last

Mistakes to avoid:

• Fast movements (stirs up dirt)
• Skipping areas (leaves dirt behind)
• Vacuuming with dirty pre-filter (loses suction)
• Letting air in (loses prime)

Vacuum to Filter vs. to Waste

One of the most important decisions:

To vacuum to waste:

1. Set multiport valve to "Waste" or "Drain"
2. Monitor water level
3. Add water with hose if needed
4. Work quickly to minimise water loss

Vacuuming Frequency

Recommendations by Situation

Signs You Need to Vacuum

• Visible dirt on the bottom
• Cloudy water in the bottom area
• Debris accumulated in corners
• Dirty waterline
• After algae treatment

Equipment and Accessories

Vacuum Heads

Hoses

Sizing:

• Length = pool diagonal + 1-2m
• Diameter: 32mm (standard) or 38mm (higher flow)
• Material: UV and chlorine resistant

Hose maintenance:

• Store unrolled or on reel
• Avoid permanent bends
• Check periodically for holes
• Replace every 3-5 years

Telescopic Poles

Important features:

• Secure locking on extensions
• Corrosion resistance (aluminium or stainless)
• Adequate weight (not too heavy or light)

Robotic Vacuum Maintenance

Care After Each Use

1. Remove from pool

• Don't leave permanently in water
• Protects components

1. Clean the filter/bag

• Empty debris
• Wash with water
• Let dry

1. Inspect rollers/brushes

• Remove wrapped hair and threads
• Check for wear

1. Rinse exterior

• Remove water chemicals
• Especially after shock treatment

Periodic Maintenance

Common Robot Problems

Troubleshooting

Loss of Suction

Causes and solutions:

Hose Won't Stay on Bottom

Causes:

• Air trapped in hose
• Hose too stiff (cold)
• Didn't prime correctly

Solution:

• Re-prime completely
• Leave hose in sun to soften
• Use hose weights

Vacuum Doesn't Glide Well

Check:

• Head wheels/rollers
• Brush wear
• Bottom surface (roughness)
• Adequate suction

Vacuuming in Special Situations

After Algae Treatment

Specific procedure:

1. Let dead algae settle (24h)
2. Always vacuum to waste
3. Use even slower movements
4. Don't brush before (spreads algae)
5. Monitor water level
6. Repeat if necessary

Heavy Sand on Bottom

Common in Margem Sul coastal areas:

1. Let settle completely
2. Vacuum to waste (sand damages filter)
3. Very slow movements
4. May need several sessions
5. Check sand source (wind, footwear)

After Storm

Recommended steps:

1. Remove large debris first (net)
2. Brush walls and floor
3. Let settle 30-60 minutes
4. Vacuum to waste
5. Shock treat
6. Filter 24h

Very Dirty Pool (Abandoned)

For pools left without maintenance for a long time:

1. Don't vacuum immediately (cloudy water)
2. Treat water chemistry first
3. Flocculate if necessary
4. Let everything settle (24-48h)
5. Vacuum to waste
6. Repeat process if needed

Equipment Costs

Manual Vacuuming

Automatic Vacuums

Annual Maintenance

Tips to Maximise Efficiency

Before Vacuuming

1. Always vacuum with a clean filter
2. Brush surfaces beforehand
3. Remove large debris with net
4. Check system is primed

During Vacuuming

1. Slow, systematic movements
2. Overlap passes
3. Monitor filter pressure
4. If you lose suction, stop and check

After Vacuuming

1. Wash equipment with fresh water
2. Store away from sun
3. Backwash if you vacuumed a lot
4. Check water chemistry

Frequently Asked Questions

How often should I vacuum the pool?

It depends on usage and location. For regular summer use, 1-2x per week is the minimum. Pools under trees or in sandy areas need more frequent vacuuming. With an automatic robot, you can programme daily vacuuming.

Can I leave the robot in the pool permanently?

Not recommended. Constant exposure to water chemicals reduces the equipment's lifespan. Also, the cable can interfere with swimming. Remove after each use and store in a protected location.

Why does dirt return after vacuuming?

You're probably vacuuming too fast, which stirs up particles that then settle again. Or there may be dirt on the walls that keeps falling. Brush well before vacuuming and use very slow movements.

When should I vacuum to waste instead of filter?

Whenever there's heavy debris, especially fine sand, dead algae or after shock treatment. If you vacuum this debris to the filter, it can clog or damage it and the dirt returns to the pool through the returns.

Does a robot completely replace manual vacuuming?

For regular maintenance, yes. But for specific situations (heavy debris, algae, vacuuming to waste), manual vacuuming is still necessary. Ideally, have both available.

Conclusion

Vacuuming the pool correctly is essential for maintaining clean, crystal-clear water. Key points to remember are:

• Preparation is fundamental – Brush and remove large debris first
• Slow movements – Haste is the enemy of effective cleaning
• Prime the hose well – Prevents suction loss and air intake
• Know when to vacuum to waste – Algae, sand and heavy debris
• Equipment maintenance – Extends lifespan and maintains effectiveness
• Robot + Manual – The ideal combination for all situations

If you need professional help with your pool in Margem Sul, ManutençãoPiscinas is here to help. Contact us for a no-obligation quote.