By Al Bustan Pools
Pool cleaning in Dubai is not just skimming leaves. Heat, UV, dust, sandstorms, sudden rain and long absences all attack your water, and a pool that looks fine on Friday can be green by Tuesday. This guide covers the full job: what proper cleaning includes, how often it needs to be done, how to fix every common dirty-pool problem (green, cloudy, brown, smelly, scaly), how to clean the filter, vacuum and backwash correctly, when a robotic cleaner is worth it, and how to decide between doing it yourself and hiring a professional.
This guide is part of our wider Swimming Pool Care in Dubai: Complete Owner’s Guide. Water chemistry and routine servicing are covered in more depth in our Pool Maintenance guide, and equipment faults in our Pool Repair guide.
The short version
- Cleaning removes what you can see: debris, dust, algae, stains. Maintenance (chemistry and equipment) stops it coming back. You need both.
- In Dubai, clean at least weekly, and twice weekly in summer or if the pool is dusty or near trees.
- Almost every dirty-water problem needs three things: brushing, filtration and correct chlorine. Skipping any of them is why fixes fail.
- Algae and cloudy water usually mean the filter is the bottleneck. Clean it often during recovery.
- Dust and sandstorm debris must be filtered out, not chlorinated away.
- Do not swim while chlorine is at shock levels.
What professional pool cleaning actually includes
A proper cleaning visit is more than a skim and a dose of chlorine. A complete visit includes:
- Skimming the surface and emptying skimmer baskets.
- Emptying the pump basket (with the pump off).
- Brushing walls, steps, floor and behind ladders.
- Vacuuming the floor (manual vacuum or robot).
- Cleaning the tile line and waterline when needed.
- Testing the water and adjusting chemistry.
- Checking and cleaning the filter, or backwashing the sand filter when pressure indicates it.
- A quick equipment check: pump running, pressure normal, no leaks or noises.
- A written or digital record of readings and what was added.
When you compare quotes, compare these items. A cheaper visit that skips brushing, filter care or testing costs more in the end.
How often should you clean a pool in Dubai?
| Situation | Suggested frequency |
|---|---|
| Normal villa pool, winter | Once a week |
| Normal villa pool, summer | Twice a week |
| Pool near trees, palms or construction | Twice a week plus daily basket checks |
| After a dust or sandstorm | Same day or next day, full clean |
| After heavy rain | Within a day, full clean and test |
| Pool in use by many swimmers | Twice a week or more |
| Unused pool | Weekly minimum, never skip entirely |
Between professional visits you can skim and empty baskets yourself every day or two. The number to watch is not how clean the pool looks but whether it is brushed, filtered and balanced.
Why pools go dirty so quickly in Dubai
- Heat speeds algae growth and burns off chlorine.
- UV destroys unstabilised chlorine within hours.
- Dust and sand constantly enter the water, clog filters and make water dull.
- Organic matter (leaves, flowers, insects, sunscreen, sweat) consumes chlorine.
- Short pump run times leave dead spots where algae starts.
- Neglect for even a few days in summer can lead to a full algae bloom.
Green pool: why it happens and how to fix it fast
Green water is an algae bloom. It happens when chlorine drops below what is needed, usually because of heat, UV, rain, a dirty filter, high stabilizer or a pump that has not been running long enough.
Step-by-step recovery
- Test the water. Check free chlorine, pH, alkalinity and cyanuric acid (CYA). If the chlorine is zero, algae has taken over.
- Remove debris. Skim and empty the baskets. Vacuum loose debris, preferably to waste, so it does not clog the filter.
- Correct pH. Chlorine works best when pH is around 7.2 to 7.6. Shocking at high pH wastes chlorine.
- Brush everything. Walls, floor, steps and corners. Brushing breaks algae off surfaces so chlorine can kill it.
- Shock the pool. Raise free chlorine to a high level. A widely used guideline is to hold free chlorine at about 40 percent of your CYA reading when treating green water (for example, around 16 ppm if CYA is 40). Use a product labelled for pool shock and follow its instructions.
- Run the pump 24 hours. Keep the filter running continuously until the water clears.
- Clean the filter repeatedly. Dead algae clogs it. Backwash a sand filter or rinse a cartridge whenever pressure rises.
- Retest and keep chlorine up. Chlorine must not drop to zero during treatment. Dose as needed through the day.
- Finish. When the water is clear and the chlorine holds overnight, bring the chlorine back to a normal range (about 1 to 3 ppm) before swimming.
How long does it take?
A lightly green pool commonly clears in two to three days. A dark green or neglected pool can take a week or more, with repeated filter cleaning. If chlorine keeps disappearing, the CYA, a metal problem or an unrecognised leak or circulation issue may be involved.
Why a green pool keeps coming back
- CYA far too high or too low
- Pump runs too few hours
- Filter dirty or media worn out
- Poor circulation (blocked returns, closed valves, air in the system)
- Phosphates or organic load feeding algae
- No regular brushing
Algae: green, black and yellow (mustard)
| Type | Looks like | Treatment |
|---|---|---|
| Green | Green water or green film on walls | Brush, shock, filter continuously |
| Mustard / yellow | Yellow-brown dust-like patches, often in shaded areas, returns after brushing | Brush hard, shock, treat equipment and swimwear too, repeat |
| Black | Dark spots, often on plaster, grout and rough surfaces | Brush with a stiff brush (stainless brush on plaster only if suitable), shock, apply algaecide or treat with chlorine tablet directly on the spot, repeat |
Mustard algae is chlorine-resistant on surfaces and can survive on pool toys, ladders and swimwear. Wash or treat these at the same time or the algae returns.
Algaecide is a support tool, not a replacement for chlorine, brushing and filtration.
Cloudy pool water
Cloudy water has several possible causes, and you need to know which one before treating it.
| Cause | Clue | Fix |
|---|---|---|
| Dirty or failing filter | Pressure high or low, flow weak | Clean or backwash the filter, replace media if old |
| Short pump hours | Water clears only after long running | Increase run time |
| High pH or alkalinity | Cloudy even with chlorine | Rebalance water |
| Low chlorine | Cloudy turning greenish | Test and raise chlorine |
| Very fine dust | After wind or dust | Filter longer, clean filter, consider a clarifier |
| High calcium hardness | Chalky cloudiness, scale on surfaces | See scale section |
| After shock | Temporary haze | Keep filtering, clean filter |
If the water is cloudy and the chlorine is correct, look at filtration first. Clarifiers and flocculants can help but they are tools, not cures. Flocculant requires vacuuming to waste afterwards.
Brown or yellow water
Brown or tan water in Dubai is usually fine dust or dirt after wind, rain or a sandstorm. Filter, brush and vacuum. If the colour appears after adding chemicals or when the pool is filled from a certain water source, test for iron, copper and other metals. Metals show up as brown, green-blue or black staining and need a sequestrant or metal remover. Do not shock a pool with a metal problem without advice, because chlorine can oxidise the metals and stain surfaces.
Neglected pool recovery
If the pool has been left for weeks or months, work in a set order:
- Remove large debris by net and hand, including leaves and dead animals.
- Turn on the pump and check the equipment. Clean the baskets.
- Clean the filter before you start, and expect to clean it many times.
- Test and correct pH and alkalinity.
- Brush and vacuum to waste.
- Shock to treat algae and keep chlorine up for several days.
- Run the pump continuously.
- Clean or backwash repeatedly.
- Check for equipment damage, leaks or cracked plaster once the water is clear.
Draining is a last resort. Emptying a pool can damage the shell, pop the pool out of the ground where groundwater is high and cause plaster to crack. If the water is beyond recovery, get a professional assessment before draining. The structure matters more than the water.
Green pool after being left on holiday
This is the most common Dubai pool call. A few weeks of summer with low chlorine and little circulation is enough for a full bloom.
Before you leave
- Clean the filter and brush the pool.
- Balance the water and raise chlorine and stabilizer to a safe range.
- Set the pump on a timer to run long enough every day.
- Top up the level and consider a cover to reduce evaporation and debris.
- Arrange a service visit every week or two.
When you return to a green pool Follow the green pool recovery steps above. Do not simply add a large amount of chlorine and hope: brush, filter and clean the filter often.
Chlorine smell and eye irritation: chloramines
A strong chlorine smell is usually not too much chlorine. It is chloramines, which form when chlorine reacts with sweat, sunscreen, urine and other organic matter. They irritate eyes and skin and smell sharp.
The fix is to shock the pool to “breakpoint” so chloramines are destroyed, not to add small repeated doses. A guideline is to raise free chlorine to about ten times the combined chlorine reading. Keep brushing, run the pump, and re-test. Prevent it by showering before swimming, keeping free chlorine at a steady level and removing organic load by regular skimming and filtering.
White scale and calcium stains on tiles
White crusty deposits at the waterline and on tiles are calcium scale. In hot, evaporating climates, calcium concentrates and scale builds when calcium hardness, pH or alkalinity is high.
Fixing it
- Test calcium hardness, pH and alkalinity.
- Lower pH and alkalinity into range.
- Remove existing scale with a pumice stone on tile, or a tile cleaner or scale remover suited to your tile type. Test a small area first, because acid and abrasives can damage natural stone, glass mosaic and grout.
- If calcium hardness is high, partially drain and refill with fresh water, then rebalance.
- Keep levels in range and clean the waterline regularly.
Severe scale on tiles may need professional treatment such as acid washing or bead blasting, depending on the surface.
Sandstorms and dust: step-by-step
- Do not run a vacuum that would clog the filter with a thick layer of dust, and skim the surface first.
- Empty the skimmer and pump baskets.
- Brush the walls and floor so settled dust lifts into the water.
- Vacuum to waste if the layer on the floor is heavy.
- Clean or backwash the filter, then repeat once the water clears a little.
- Test and rebalance chemistry, especially chlorine and pH.
- Run the pump continuously until clear.
A clarifier can help bind very fine particles so the filter can catch them. Chlorine does not remove dust.
Cleaning after heavy rain
Rain dilutes stabilizer, chlorine, alkalinity and calcium, adds dirt and can cause algae within a day or two.
- Check the level. If it is above the normal level, lower it by backwashing or draining to waste.
- Clean skimmers and baskets and brush the pool.
- Test and rebalance, especially chlorine and pH.
- Keep the pump running until water is clear.
- Be careful with electrical equipment in the pump room, and make sure the room itself has not flooded.
Keeping leaves and debris out
- Empty skimmer baskets often during leaf or date season.
- Use a leaf net daily.
- Keep the area around the pool swept.
- Trim overhanging plants where possible.
- Consider a pool cover, especially when the pool is not in use.
How to vacuum a pool: manual or robotic
Manual vacuum
- Fill the vacuum hose with water so there is no air in the line.
- Attach the vacuum head to the pole and the hose to the skimmer or dedicated vacuum port.
- Move slowly across the floor in overlapping lines.
- For heavy debris or algae, set the multiport valve to waste so dirt does not go through the filter. This lowers the water level, so top up afterwards.
- Clean the filter and baskets after.
Robotic cleaner
A robotic cleaner runs on its own power, has its own filter and does not use your pool pump. Empty its filter after each run. Robots are good for routine debris but they do not replace brushing, filter care or balanced water.
How to clean a pool filter
The right method depends on the filter type.
Sand filter
- Backwash when pressure is about 8 to 10 psi above the clean pressure.
- Turn the pump off, set the valve to backwash, run for one to three minutes until the sight glass is clear, then rinse for about thirty seconds and return to filter.
- Sand lasts roughly five to seven years before it should be replaced. Worn sand channels water and gives poor filtering.
Cartridge filter
- Turn the pump off, remove the cartridge and hose it down between the pleats.
- Soak in a cartridge cleaner every few months to remove oils and scale.
- Replace when pleats are cracked or the cartridge no longer cleans up (often every one to three years).
Diatomaceous earth (DE) filter
- Backwash, then recharge with fresh DE powder.
- Follow the manufacturer’s safety instructions because DE dust should not be inhaled.
How to backwash a sand filter correctly
- Turn the pump off.
- Set the multiport valve to backwash.
- Turn the pump on and run until water in the sight glass is clear (normally one to three minutes).
- Turn the pump off, set the valve to rinse, run for about thirty seconds.
- Turn the pump off, return to filter, restart.
- Top up the water you lost.
Backwashing too often wastes water and may actually reduce filtering if the sand bed is clean. Let pressure guide you. Never change the multiport valve position with the pump running.
Pool cleaning cost in Dubai: what affects it
Costs vary by company and pool. We list the factors rather than invent a price.
- Pool size and surface area
- Visit frequency
- Whether chemicals are included
- Pool condition on the first visit (a green or neglected pool is a one-off recovery job)
- Extra work such as filter cleaning, deep scale removal and equipment checks
- Access, location and travel time
- Contract length
Ask for a quote that spells out visits per month, what each visit includes, whether chemicals are covered and the cost of recovery work. Be cautious of a price that is much lower than others with no written scope.
DIY or professional cleaning?
| DIY | Professional | |
|---|---|---|
| Cost | Equipment and chemicals only | Service fee plus chemicals |
| Time | Weekly, plus after weather events | Handled for you |
| Water testing | Needs a good kit and knowledge | Done every visit, logged |
| Recovery from green or neglected pool | Possible but slow and error-prone | Faster, with the right products and equipment |
| Equipment checks | Only if you know what to look for | Part of the visit |
| Travel or holidays | Pool at risk | Covered |
Many owners combine both: a professional on a regular plan, with simple skimming at home in between.
Is a robotic pool cleaner worth it?
A robot is worth it if the pool has a big floor area, you want less manual vacuuming, or you have frequent light debris. It will not fix water chemistry, clean the waterline fully or replace filter cleaning.
| Type | How it works | Notes |
|---|---|---|
| Suction-side | Connects to the skimmer and uses the pump | Cheapest, uses pump power, can clog filter |
| Pressure-side | Uses water pressure from a return line | Good with leaves, may need a booster pump |
| Robotic | Own motor and filter, plugs into power | Most thorough, no load on pool pump, highest cost |
Before buying, check pool surface (some robots grip poorly on certain finishes), the need for climbing walls and the waterline, filter basket size, cable length and whether the manufacturer supports service locally.
Cleaning for villas, buildings and hotels
- Villa pools: a regular weekly or twice-weekly visit, with a flexible plan after weather.
- Apartment buildings and communities: larger pools require scheduled daily and weekly tasks, logged water tests and fast response after heavy use or bad weather.
- Hotels and commercial pools: face stricter water-quality requirements, higher bather loads and inspection. Confirm current requirements with the relevant authority.
Safety while cleaning
- Wear gloves and eye protection when handling chemicals.
- Never mix chlorine with acid or different chlorine products.
- Add chemical to water, not water to chemical.
- Keep swimmers out during shock treatment and until chlorine is back near normal (many guidelines say below about 5 ppm for safe swimming; follow the product label).
- Turn the pump off before opening baskets or changing valve positions.
- Keep chemicals locked away from children and pets.
Frequently asked questions
Why is my pool green even though I add chlorine? The chlorine may be disappearing because of high temperature, low CYA, a dirty filter or heavy algae load. Brush, filter and shock rather than adding small doses.
How long until a green pool is clear? Two to three days for a light bloom, a week or more for a heavy one.
Can I swim in a cloudy pool? No. Cloudy water hides hazards and often means disinfection is not working.
Do I need to drain the pool to clean it? Rarely. Drainage should be a professional decision.
How often should I backwash? When the pressure gauge says so, not on a fixed calendar.
Does a sandstorm ruin the pool? No, but it will clog filters and unbalance water. A prompt clean and rebalance fixes it.
Is algaecide enough? No. It supports chlorine and brushing but does not replace them.
Need it done properly?
Al Bustan Pools offers regular and one-off pool cleaning across Dubai, including green pool recovery, post-storm cleaning and filter service. Contact us for an inspection and an itemised quote.