How to vacuum up swimming pool sediment to make it crystal clear again

For those looking to build a swimming pool at home, it’s important to understand that one thing every pool owner encounters is “sediment in their swimming pool.” This includes fine dust, sunken leaves, and sediment deposits on the floor. If left for too long, the water can become cloudy, unusable, and even a breeding ground for germs. But don’t worry, he has a method for vacuuming up pool sediment. This method is guaranteed to remove turbidity from your pool water and eliminate any algae buildup.

Why does the swimming pool have sediment?

1. Dust and dirt from outside

The main causes of sediment buildup in swimming pools are dust, leaves, and sand that blow into the pool. When the dust falls into the water, it gradually sinks to the bottom, turning into brown or gray sediment that accumulates in the pool, requiring vacuuming.

2. Sediment from chemical residues

When too much chlorine or pH adjusters are added to a swimming pool, some of the substances may not dissolve completely, causing them to precipitate as white powder and accumulate in the pool.

3. Clogged filter system

If the filtration system is clogged or the filter in your pool is too old, it will not be able to completely remove all the debris, causing sediment to build up in your pool. Therefore, you should replace the pool filter, maintain the pool filter tank  , and maintain the filter system regularly.

4. Water does not circulate normally.

Swimming pools that don’t have daily water circulation systems or are closed for too long can cause various foreign objects to accumulate in the pool, making the water cloudy and unusable. This also leads to the accumulation of germs. Therefore, pool sediment must be vacuumed to keep the water clean and pleasant to use.

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Equipment to prepare before vacuuming sediment

  1. Vacuum Head: This is a suction head that connects to an extendable handle and suction hose. It is used to suck up sediment from the pool floor. It is recommended to choose a brush head with rotating wheels for tile floors. However, if it is a vinyl or fiberglass pool, use a soft brush head to avoid scratching the floor.
  2. Telescopic Pole:  Used to connect to suction heads and other equipment to reach every point of the pool bottom.
  3. Vacuum Hose:  A long rubber hose that connects from the suction head to the suction port of the filter system or water pump.
  4. Skimmer Basket:  Helps filter leaves or dust before entering the pump.
  5. Water filter (Filter System):  Filters the water that has been sucked out of the sediment before releasing it back into the pond.
  6. Pool edge brush and powder scoop:  Used to help remove stains on the walls and floating objects before sucking up sediment.

How to vacuum a swimming pool

1. Temporarily turn off the water filtration system.

The first step in vacuuming a swimming pool is to turn off the water pump and filter system before starting work to prevent water from flowing back during the installation.

2. Prepare the sediment suction kit.

  1. Connect the suction head to the extension handle, then connect the suction hose to the suction head.
  2. Immerse the entire unit in water, expelling any air from the line, leaving the other end of the line in water (to prevent air from entering the pump).
  3. Once the hose is filled with water, insert the end of the hose into the pool’s suction port (Skimmer or Vacuum Port).

3. Set the filter system to “Waste” or “Drain”.

If your pool filter is a sand filter, turn the valve to the “Waste” or “Drain” mode to prevent the water drawn out along with the sediment from being recirculated back into the filter system. However, this mode will slightly reduce the pool water level and should be refilled later.

4. Start sucking the sediment slowly.

Then slowly vacuum the pool sediment by following the vacuuming method as follows:

  • Move the suction head slowly. Do not rush or sweep hard, as this will cause sediment to spread.
  • Start from the deep corner of the pool and gradually move out to the shallow end.
  • If the sediment is very thick, it may need to be done 2–3 times to completely clean it.

5. Add water back into the pool.

The fifth step in the pool sediment vacuuming process is to fill the pool with water. After vacuuming the sediment, the pool water level will drop. Use a hose or automatic filling system to fill the pool to the normal level (about halfway up the skimmer compartment).

6. Open the filter system and check the chemical values.

  • Turn the filter system back on to “FILTER” mode to filter out any remaining debris.
  • Check the chlorine and pH levels of the water. If the chlorine is low, add chlorine to bring it up to the standard level (1–3 ppm).
  • Adjust the pH  to between 7.2–7.6 to maintain clarity and reduce future sediment buildup.

Tips for keeping your pool crystal clear for a long time

  • Turn on the water filter system at least 6–8 hours a day  to allow water circulation and reduce sediment buildup.
  • Scrub the pool floor and walls once a week  to help prevent algae and sediment buildup.
  • Scoop out the leaves daily.  Small leaf litter that sinks to the ground will decompose into sediment and make the water cloudy.
  • Backwash the filter system regularly.  For sand filter pools, the system should be backwashed every 1–2 weeks.
  • Check chlorine and pH levels regularly,  as chemically unbalanced water is the main cause of sediment and turbidity.

Warning signs that a pond is beginning to have “sediment buildup”

  • The water becomes cloudy or has dust floating on it when the surface is agitated.
  • The pool floor is slippery or has fine powder stuck to it.
  • I have to add chlorine more often than usual but the water still feels unclean.
  • Filtered water flows slowly because the filter system is clogged with sediment.

When these signs are found, the sediment should be immediately vacuumed to prevent fermentation and the need to change the entire pool water.

Should I have a pool maintenance technician come and vacuum out the sediment?

Homeowners with large swimming pools often employ comprehensive pool maintenance services to vacuum out sediment. This is because pool technicians can thoroughly clean and know where sediment often accumulates. They also have a full range of tools, making vacuuming out sediment quickly, especially for large pools or those with thick sediment. This significantly saves both energy and time when cleaning the pool. Furthermore, technicians will also frequently check the filter pressure, water level, water pump, and rough chemical values, and report any problems.

Vacuuming a swimming pool isn’t difficult, but it must be done correctly and maintained regularly, at least once a week, to maintain the clarity and cleanliness of the water. It also helps extend the life of the filter system, allowing it to last for many more years. However, if you don’t know how to care for a swimming pool  , or if your pool is too large to handle thoroughly, Pool Services can help you do this instead.