Should I Backwash After Shocking Pool? Find Out Here!


Sharing is Caring


If you have a pool, then you know how important it is to keep it clean. Shocking your pool is an essential part of maintaining its cleanliness by sanitizing and oxidizing the water to remove harmful bacteria and contaminants. However, many pool owners are unsure about what to do next after shocking their pool. Should you backwash? Find out here!

Backwashing is the process of reversing the flow of water through your filter system to flush out any debris that may have accumulated in the filter. It’s an essential step in keeping your pool’s circulation healthy and efficient. But does this need to be done after shocking?

“Without proper maintenance, your shock treatment may not produce the desired results.”

In this article, we’ll take a look at the reasons why you should or should not backwash after shocking your pool. We’ll also go over some tips on how to properly maintain your pool before and after a shock treatment. By the end of this article, you will have a better understanding of how to maintain your pool’s health and clarity.

So sit back, relax, and let’s dive into the world of pool maintenance!

What is pool shocking and why is it necessary?

The Definition of Pool Shocking

Pool shocking refers to the process of adding an oxidizing agent, such as chlorine or non-chlorine alternatives like potassium peroxymonosulfate, to your swimming pool in order to eliminate contaminants that cannot be removed through regular cleaning.

This cleaning method essentially โ€œshocksโ€ the water with a high dose of sanitizer which sanitizes all the impurities and organic compounds present in the pool. It helps raise the free chlorine level above 10 ppm for 24 hours to completely disinfect water molecules.

The Importance of Pool Shocking

Shocking your pool is essential to maintain a healthy swimming environment. If you do not shock your pool, bacteria can accumulate and grow, leading to infections, rashes, and other health hazards. Additionally, not doing so results in an unappealing appearance due to algae build-upโ€™s green slime.

Contaminants that are too small or dissolved will resist physical removal methods like strainers and filters unless the use of chemicals comes into picture. In these situations pool shocking becomes a lifesaver for pool sanitation.

You should follow a regular schedule for shock treatment throughout the swimming season, including after particular events like heavy rains or heavy swimmer loads. Ideally, you should shock your pool once a week if heavily used. Otherwise, implement a bi-weekly schedule or based on pH levels slipping than controlling within the permissible range (7.5 approximately). Too much shocking can affect pool equipment, color fading, also isn’t ideal since you won’t be utilizing corresponding amounts of chemical balancing agents.

โ€œRegular upkeep and periodic maintenance goes a long way to keeping your pool clean and enjoyable.โ€ โ€“Felix Shipkevich, swimming pool and aquatic expert

The shocking process also provides the best time to backwash your pool filter, a crucial cleansing step that enables cleaning and re-circulation of filters. However you don’t need to backwash after every instance of shocking.

In general, should I backwash after shocking my pool? Only if necessary since residual chlorine can affect gaskets making them brittle over time resulting in expensive equipment damage repairs over time. Ensure doing appropriate due diligence while balancing replacement schedules with water chemistry parameters.

โ€œBalancing of chemicals doesn’t just get your pool crystal clear but also extends the life of all components including liner color brightening.โ€ โ€“ Margaret Brady, Professional Cleaning Consultant

All in all, its importance is something which can never be undermined-a well shocked and maintained pool leads to enjoyment without many concerns related to potential health or safety hazards ultimately giving complete peace of mind during summers.

What happens if I don’t backwash after shocking my pool?

Increased Risk of Clogging

When you shock your pool, the process breaks down and removes organic matter like algae and bacteria. While this treatment is essential for maintaining a clear and healthy pool, it can also cause clogs in your filter system. Without proper filtration, leaves, debris, and other particles could accumulate quickly, creating severe blockages that interfere with the efficiency of your system.

If not cleared, these blockages could restrict water flow through your filtration system and force the pump to work harder than usual, which in turn shortens its lifespan. This increased workload could lead to overheating or even burnout of motor parts. If you continue using the pool without addressing these issues, it may become necessary to replace the entire filtration system, which would be far more expensive than simply backwashing the pool as required.

Reduced Water Quality

Another issue you may face by not backwashing your pool after shocking is reduced water quality. Shock treatments are often made up of chlorine and other chemicals designed to break apart contaminants and kill off unwanted organisms. But some of these residual elements will remain suspended in the water unless properly filtered away. If left unfiltered, these chemical residues will inevitably alter the pH level of your water, making it either too acidic or too alkaline depending on factors such as regular use and weather conditions. This reduced water quality could then create health problems for anyone who comes in contact with the water for an extended period. Swimmers may experience skin irritation, eye burning, and even breathing difficulties if exposed to water with poor quality so always make sure to backwash the pool after shocking.

Ineffective Shocking

Shock treatments are designed to deal with specific pool problems, such as algae infestations. However, without efficient filtration and water movement through the system, the chemicals you add may not spread evenly throughout your pool. This issue is especially prevalent in larger pools with complex filtration systems and significant depths of water and could lead to ineffective shock treatment. A poor distribution of these chemicals means that some parts of your pool will remain contaminated or unsanitized while others receive excess amounts of chemicals, which only serves to diminish their health benefits for swimmers.

Shortened Filter Lifespan

Your pool filter’s lifespan depends on several factors like usage frequency, quality of equipment, and maintenance standards. One vital factor that influences how long a filter lasts is proper backwashing. When you don’t backwash after shocking or cleaning the pool, it leads to an accumulation of clogging debris over time, which can shorten the lifespan of the filters and pump significantly. Clogged filters render them less effective during the filtration process and could require more frequent replacement than properly maintained ones.

โ€œTo ensure optimal pool performance as well as protect your investment, consistent upkeep including regular filtering and chemical balancing are essential.โ€ -Kris Davidson

Failing to backwash your pool after a shock treatment poses imminent risks to your pool and its users. Implementing a schedule to carry out this task should form part of your overall maintenance strategy. Depending on your pool usage, location, and other variables, a routine plan for maintaining and checking water chemistry, skimming out leaves and debris may be necessary. Donโ€™t take chances; make sure you contact a professional who understands the appropriate procedures and techniques required to maintain and keep your pool healthy and functioning correctly.

How often should I backwash my pool?

Frequency Depends on Usage

The frequency of backwashing your pool will depend mainly on how frequently you use it. Generally, heavy usage and larger pools with more people increase the occurrence of debris build-up which causes a reduction in filter efficiency and flow rate.

If you are using your pool every day or have multiple swimmers every other day, then backwashing becomes essential to keep it clean and maintain good water quality. However, if your pool is used less frequently, once a week might suffice, barring unforeseen issues like a storm that blows leaves and dirt into the pool all at once.

Recommended Schedule

Although individual factors may affect the frequency, a recommended schedule for home pools is to backwash once every month. If you only use your pool infrequently, backing it up once per season when opening tends to work well. As mentioned above, when observing visible debris collected in clear filter openings, it may be necessary to perform a backwash even before an established timeframe has passed. Adhering to this schedule would help prevent excess buildup of contaminants and minerals that reduce filtration efficiency over time, which can eventually lead to expensive malfunctions requiring professional intervention.

โ€œIf you don’t keep your filters clean, they’re not going to function as effectively, bacteria and algae can start building up in the layers… It’s harmful to humans.” – Larry Hobbs, CEO Leak Doctor Pool Service

In addition, always backwash after shocking your pool. Shocking essentially entails mixing a large dose of chlorine into the water to remove any organic contaminants present. This results in these dead particles globbing together, forming what is called combined chlorine. Although harmful to breathe in, itโ€™s very important to get rid of this substance, which can be difficult for your filter to separate from the water. Therefore it is important to backwash after shocking and vacuum any debris that might have collected at the bottom during the process.

It’s also essential to regularly maintain other aspects of your pool whether or not you backwash as required. Indicators such as pressure gauge readings or decreased suction levels are crucial signs that your filtration system needs maintenance work. Otherwise, clogging impurities build up with time adhereing inside crevices of the filter medium creating a haven for bacteria growth. Properly maintaining your filters ensures optimal flow rate and improved efficacy in trapping contaminants. It will ultimately reduce service costs linked to repair and replacement down the line.

“If a filter isn’t cleaned properly, if it’s damaged, or if all its components aren’t put together correctly, this can lead to larger problems”… “it’s always better to prevent a problem than wait until we must correct something.” – Dena Crecy-Meyer, Apex Pools & Spas LLC

While following a standard schedule is advisable, recognizing when your pool demands extra attention should not be ignored due to merely keeping to a prescribed frequency chart. Adequate machine efficiency checks when filtered substances start to show makes sure both man-made and natural pollutants radiate minimally within the clean refreshing environment of your swimming pool delighting guests old and young alike.

Can backwashing too often harm my pool?

The short answer is yes, frequent and unnecessary backwashing can harm your pool in several ways. While backwashing your pool filter is a crucial part of pool maintenance, doing it too often or without proper reason can lead to problems that can damage your pool.

Potential Damage to the Filter

Backwashing removes debris and contaminants trapped in your pool’s sand or D.E. filter by reversing the flow of water through the filter media, dislodging particles and sending them out through the waste line. However, excessive backwashing can lead to wear and tear on the filter system.

In sand filters, overbackwashing can cause channels to develop in the sand bed, allowing unfiltered water to pass through. This means that the sand will not be evenly distributed throughout the tank, reducing its filtering capacity.

D.E. filters have pre-coated grids with diatomaceous earth powder, which traps smaller particles than a sand filter. The powder coating builds up significantly during use and must be removed with regular backwashing. Overbackwashing causes the DE powder layer to thin out, leading to increased pressure across the grid elements. This puts more strain on the filter and eventually leads to decreased filtration efficiency and possible damage to the internal parts of the filter.

“Over-backwash cleaning can shorten the life of both types of pool filters because clean, fresh water constantly chewing at the grinding surface they share can turn minor abrasions into quickly-eroding pits.” -Chet Raley, Swim University

Increased Chemical Usage

If you backwash frequently, you are continuously adding fresh water to your pool. This dilutes the existing chemicals in your pool while adding new ones, which may require additional treatment. For example, if chlorine levels are high before the backwash, the added fresh water will lower the concentration of chlorine in your pool, requiring you to add more chlorine to bring it up to the correct level.

Additionally, frequent backwashing may lead to imbalances in the chemical levels of your pool because some chemicals are difficult to readjust. For example, total alkalinity levels can vary widely due to changes in pH, and they must be balanced by manual additions or altered beforehand with chemical treatments. If regular backwashing constantly throws off these chemical balances, it could cause additional problems that require more time and resources to rectify.

Higher Water Bills

The more often you backwash, the more you need to replace lost water from the process, which means higher water bills over time. Keeping track of when to backwash helps avoid an unnecessary wasted gallon addition to the bill.

Extensive backwashing also reduces the amount of usable pool water because each cycle requires new water sources. This lowers circulation within the system, leading to potential poor filtration performance and stagnation areas.

The negative impacts of excessive and unnecessary backwashing warrant owners’ attention; not only are there immediate expenses, but those costs can accumulate over time.” -Hayward Pool Products Inc.

While backwashing is a necessary part of pool maintenance, doing so too frequently or without proper reason can harm your pool filter and lead to costly repairs over time for budget-friendly lifestyle maintainence try to have at least two-week intervals between backwashes unless dire circumstanaces occur.

Is there a specific technique for backwashing after pool shocking?

Pool shock, also known as super chlorination, is the process of adding a large amount of chlorine or other chemicals to a swimming pool in order to disinfect and clear it from organic and inorganic debris. Shocking a swimming pool is essential for maintaining water quality and preventing health problems caused by poor hygiene. However, many pool owners wonder whether they should backwash their filter after pool shocking and if so, how.

Turn Off the Pump

The first step to properly backwash your pool filter after shocking is to turn off the pump. This will ensure that no water flows into the filter when you switch the valve to the backwash position. Before turning off the pump, make sure that all skimmer baskets and filters are free from any large debris or objects that can clog the system.

Switch the Valve to Backwash

Once the pump is turned off, locate the multiport valve on top of the filter and switch it to the “backwash” setting. The backwash setting allows water to flow in reverse through the filter and out of the waste line, taking with it all the debris that was trapped inside the filter during normal operation.

Run the Pump for 2-3 Minutes

After switching the valve to backwash, turn on the pump again and let it run for 2-3 minutes. During this time, water will flow backwards through the filter and out of the waste line, carrying away dirt, sand, algae, and other contaminants. Watch the sight glass located near the filter to monitor the clarity of the water coming out of the waste line. When the water looks clear, stop the pump again.

Switch the Valve to Rinse

Once the pump is off, switch the multiport valve to “rinse” and turn on the pump again for 1-2 minutes. Rinsing the filter after backwashing helps get rid of any debris that may have been left in the system. It also allows a small amount of clean water to flow through the filter before switching back to normal mode.

“Backwashing your pool filter after shocking ensures that you remove all the dead bacteria, algae spores, and other organic material from the pool water. However, it is important to follow the proper technique and timing to avoid damaging the filter or wasting water unnecessarily.” -Swim University

Backwashing your filter after pool shocking is recommended as it removes the dead bacteria, algae spores, and other fine particles that were killed during this process. Additionally, it’s essential to follow the correct procedure when performing this task. Following these steps will lead to safer swimming conditions and a cleaner pool overall.

Frequently Asked Questions

Is it necessary to backwash after shocking a pool?

Yes, it is necessary to backwash your pool after shocking it. Shocking your pool helps eliminate bacteria and other contaminants, but it can also cause buildup in your filter. Backwashing your pool removes this buildup and ensures that your pool remains clean and safe for swimming.

What happens if I don’t backwash after shocking my pool?

If you don’t backwash your pool after shocking it, the contaminants that were killed off during the shock treatment will remain in your pool. This can lead to cloudy water, unpleasant odors, and even illnesses. Additionally, not backwashing your pool can cause your filter to become clogged, which can lead to costly repairs.

How often should I backwash my pool after shocking it?

It’s recommended that you backwash your pool after every shock treatment. However, the frequency of your backwashing may depend on the size of your pool, the type of filter you have, and the amount of use your pool gets. If you notice your water becoming cloudy or your filter pressure increasing, it’s time to backwash.

Can backwashing too often harm my pool?

Backwashing your pool too often can cause your filter to wear out more quickly than normal. However, this is only a concern if you’re backwashing your pool excessively. Backwashing your pool after every shock treatment or as needed is not likely to cause any harm.

Are there any alternatives to backwashing after shocking my pool?

Yes, there are alternatives to backwashing after shocking your pool. One option is to use a filter cleaner to remove buildup in your filter without the need for backwashing. Another option is to use a cartridge filter, which does not require backwashing at all.

What should I do if I’m unsure whether to backwash after shocking my pool?

If you’re unsure whether to backwash your pool after shocking it, it’s best to err on the side of caution and backwash your pool. This will help ensure that your pool remains clean and safe for swimming. If you’re still unsure, consult with a pool professional for guidance.

Craving More Content?

Pool Tips USA