Cloudy pool water is one of the most common issues pool owners face, and it’s usually a sign that something isn’t working properly.
As simple as clear water may seem on the surface, maintaining that ideal look requires effort and the proper tools. There must be consistent upkeep of filtration systems, chemical levels, and cleaning. Keeping track of these factors and figuring out where the problem lies can be overwhelming for pool owners.
This guide breaks down what may be causing your cloudy pool water, and whether they’re simple fixes or require professional attention.
1) Filtration Issues
Clogged or malfunctioning filters are generally the most common cause of cloudy pool water. New pool owners don’t always know how often they need to clean their cartridge or backwash sand.
Cartridge filters generally last 2-3 years, while sand varieties can go between 5-7. Hence, replacing them isn’t always on the minds of most pool owners, and can lull them into a false sense of security.
A filtration system absorbs debris and grime, often invisible to the human eye. If that grime piles past a certain point, the system cannot do its job.
Many filtration problems are easy, preventable fixes. Aside from not cleaning or replacing your filter when needed, the following issues are also very common:
- Larger Debris Clog: Algae and bacteria are not the only natural waste that can end up in your pool. Leaves, rocks, and small animals like bugs or frogs can find their way in as well. Daily pool skims and frequent emptying of filter baskets are essential to keeping these at bay.
- Improper Filter Cycles: 8-12 hours per day is generally considered the ideal amount of time to run your filter daily. This enables all the water in the typical home pool to pass through the system.
- Pump Replacement: It may not be the filter itself that needs replacing, but rather your pump. Large debris can cause tears or wear down your pump, and it can erode with age as well.
If you have cloudy pool water and suspect it may be a filtration issue, it may not be immediately evident which problem you are specifically dealing with, and how severe it is. This is when calling a professional team helps significantly.
2) Low Chlorine and Facilitating Chemicals
Though many chemicals go into proper water sanitization, chlorine is at the heart of the operation. When kept between 1-3 ppm and properly stabilized, chlorine prevents growth of algae and bacteria. This keeps your pool clear and safe for swimming.
Chlorine levels can be artificially lowered by certain factors, regardless of how much you or your pool systems circulate through the water. Below a certain point, it becomes too diluted to do its job, possibly resulting in cloudy pool water.
Improper pH, alkalinity, heat, and other natural factors can destabilize chlorine, or break it down faster. This also prevents it from doing its job properly.
If you suspect chlorine levels are off, consider the following:
- Check pH, alkalinity, and calcium hardness. If pH isn’t between 7.4-7.6, Alkalinity 100 ppm, and Calcium hardness between 175-275 ppm, the chlorine becomes less effective.
- Consider Cyanuric Acid. Chlorine is sensitive to summer heat and can break down faster, especially during hot days. Cyanuric Acid shields your chlorine from UV rays and ensures it sticks around.
- Understand the difference between free and total chlorine. Free chlorine is the chlorine in the water that kills bacteria and algae. Total chlorine is mixed with the ineffective, broken-down, older chlorine. The difference between free and total chlorine should be 0.5 ppm or lower.
- Shock your pool. If the pool needs a deep clean and is exceptionally low in chlorine, a pool shock can kill algae and bacteria and help significantly in bringing clear water back to your pool.
New pool owners often understand the importance of chlorine and chemical balance but aren’t always sure how much to add. Factors like heat and the difference between free and total chlorine are often overlooked, which can impact how effective the treatment is.
For this, a professional team can come in handy. They can give you chlorine and chemical advice tailored to the size of your pool, level of natural debris (e.g. living on a shaded property with a large tree canopy), and climate.
3) Outside Contaminants
Even if your filtration systems and chemicals are checked, natural contaminants and debris can still find their way into your pool and give the water an unwanted tint.
This is particularly common during the spring opening season. Colder water has more oxygen than warm water, making the area under the tarp a hotspot for algae. Many new pool owners also struggle with winterization, and poor preparation compounds the problem.
Rainstorms can also facilitate algae/bacterial growth by throwing off the pool’s chemical levels and raising water levels. This means your filters cannot absorb all the water in one cycle.
To prevent algae or bacterial growth, the following should be in your maintenance routine:
- Vacuum and Scrub: Scrub your pool walls and vacuum the floor once a week. Algae and bacteria often lodge on pool surfaces, making this the best preventative measure.
- Daily Skims: Much like keeping your filters clean, skimming larger debris from your pool in turn prevents growth of smaller debris.
- Drain water: Remove excess water after heavy rainstorms to ensure your filters can adequately do their job.
- Consider Pool Activity: For larger families or periods following heavy pool use (e.g. parties, holidays), natural oils or sunscreens from swimmers can put pressure on filtration or chlorine.
Keeping contaminants out of your pool can be a rigorous process, and you may not always be able to maintain a consistent routine. You might want to consider professional help if:
- Nobody will be home to keep the pool clean (e.g. vacations, business trips)
- Older families looking to avoid summer heat
- DIY efforts have clearly failed
- Before and after special events with lots of guests
Keeping Your Pool in Clean & Free from Cloudy Water
Based out of Stamford, Connecticut just one hour from downtown Manhattan, Shoreline Pools has been a fixture in the Greater New York area for over five decades. Our robust team of professionals has installed, renovated, and serviced countless pools stretching from our Connecticut home base north to Ulster and Dutchess Counties in New York.
Looking for some mid-season pool cleaning services? Give us a call or email via our contact page today.
