how to clean a pool that has been sitting

How to clean a pool that has been sitting?

Leaving your pool unattended for long periods of time covered or not will require cleaning if it has been set. This information will tell you how to clean a pool that has been sitting for long periods of time. The pool water will start to turn green after only a few weeks if the water has not been sanitised, these algae will attract insects and reptiles etc. Here is a list of tips and advice of how to clean a pool that has been sitting. There are three things that you need to look out for : The filtration, the water and the condition of the actual pool for cracks and leaks.

Pool Drainage:

Draining is an important fact in all types of pools. If you have purchased a fiber glass or vinyl pool you need to avoid draining these types as the material composite may get damaged. Vinyl, for example, can shrink whilst you operate a drainage procedure and the fibreglass is lightweight and could crack. If you try and cut costs by not draining the swimming pool you will need to increase the need for chemicals and use more of the ionisers if using a QUEST pool system. Using the drained water from an ioniser and oxidiser you can use the swimming pool water in your garden as it containers no chemicals. Be aware as the water can still contain certain harmful bacteria

Large objects trash in pool:

Where there is a lot of debris floating in the pool water and also on the bottom of the pool it’s best to use a pool vacuum pump such as this will clean the pool much quicker and get rid of very large debris. However, using QUEST systems oxidiser produces hydrogen and oxygen ions that break down sun cream, dust, twigs, etc. This means you only need to clean the large debris.

Once the pool is drained it should be washed down and any stains scrubbed off or washed with a  high power pressure washer. Remember is the pool is a fiberglass or vinyl pool use a low pressure wash and use not as aggressive cleaning chemicals such as soap.

how to clean a pool that has been sitting
A dirty, abandoned swimming pool without water. Old Swimming Pool Without Water.

Always take extra precaution when you are using cleaning chemicals around the swimming pool area , chemicals such as muriatric acid ; and take care not to spill it into the pool or all your time and effort will be for nothing.

How to clean a green pool?

Drain the pool:

The first thing to do is above make sure the pool has been drained and completely clean with an acid wash on the surface. If you can’t see at least five to ten inches below then you can treat the water with electrolysis with an ionier,oxidiser such as a QUEST system.

PH Balance not correct:

Test the swimming pool’s Ph level to see how much it needs to be lowered. You can purchase a test kit, we supply copper test kits from QUEST. Make sure the copper levels are also not too high or low and the healthy Ph balance of the pool is around 7.5.

Turn the oxidiser and ioniser up to full power on your QUEST system let the system run for two days. You will then find the pool water crystal clear.

Checking pH level in blue outdoor pool by chemical tester

Filtration Blocked:

Algae can grow not only on the surface of swimming pool water but also the pipework , filtration systems. In the filtration system if not cleaned out you will also allow bacteria to grow and have debris stuck in areas not seen , these will also start to discolour the water.

Shocking the pool:

If the swimming pool water is still green after the above it’s time to shock the pool . This involves using highly toxic and very bad for your health and the environment with granular chlorine ( calcium hypochlorite ). Shocking your pool is a method of instantly killing most of the bacteria and algae.


Swimming pools left unattended for long periods of time due to a number of reasons such as house left unattended by the owners, high cost of maintenance pool servicing and many other reasons. Depending on the climate and the area the pool is situated can also affect the condition of the pool. Warmer climates will be more suitable to outdoor pools that will involve more maintenance than a indoor pool . The effect of being outside will mean the pool will need to be covered more often to protect it from the elements and also nature.

Keep the grass , path , tiled floor that surrounds the pool clean also. Make sure there is no way people can kick debris or dirt or dust into the pool. Keep the areas clean , brush them down , hose them down , but be sure you don’t hose the dirty water into the swimming pool.

Insects , flying debris , dust and if you are in a residential development area you will get more pollution from building works , pollution etc. When you use a pool you want it to be fresh and clean just to jump into. So you need to keep the pool covered , keep the water ionised and oxidised continuously to give the swimming pool the best chance of being ready so you don’t need to know how to clean a pool that has been sitting.

Using the QUEST system will enable you to keep the pool clean as well as doing other duties listed above. Due to its amazing technology the QUEST systems that  stands for Queensland Semiconductor Technologies Pty Ltd , we have designed the worlds only water sanitiser that oxidises , ionises and de scales the swimming pool.

We also produce hydroxide and oxygen ions via electrolysis to break down organic debris (sweat, sun cream, dust, leaves etc). The final process is a de scaler that prevents hard Calcium build-up. This last process as well as preserving the pool plumbing efficiency also helps the sanitisation as calcium deposits become breeding sites for bacteria.  

The three processes in the system work together in a cooperative interaction to produce a system that overall is more effective than the sum of the constituent parts. 

Key benefits of our QUEST system are: 

1) No nasty chemicals in the water, you swim in freshwater 

2) No lingering scent from the pool, ideal for use in enclosed pools with commercial surroundings such as bars , restaurants etc. 

3) Swimmers with respiratory problems or sensitive skin will appreciate our benign, non-chemical approach. 

4) The ions we put into the water have excellent latency and remain active for long periods after the sanitiser has been operated. This contrasts with the chemical systems that need longer operation, monitoring and top up with the active chemicals. 

5) Low operation cost due to above, you only need the pool pump on a fraction of the time as you don’t need the water flow. This is a massive cost saving compared to UV systems and just about all other technology. 

6) No handling and storage of nasty chemicals 

7) Simple and quick to install and operate 

8) No bleaching of the pool surrounds, tiles and quicker erosion of swimwear. 

Quest is undoubtedly the most effective and cost-efficient system on the market today

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