Optimizing Your Pool’s Filtration: A Comprehensive Guide
Recently, while enjoying the view of my pool, I found myself contemplating whether my pool was effectively skimming the surface. This led me to wonder about the optimal direction in which the pool’s water return jet should be aimed to ensure not only the best surface cleaning but also overall filter operation. After conducting some research and running a few tests, I decided to share my findings for those who might have the same questions.
For optimal filtration in your swimming pool, the return jet should be directed away from the skimmer and angled downward. This positioning promotes superior water circulation and filtration. The uppermost layer of your pool water typically contains the most debris; thus, keeping this layer calm is essential for effective cleaning.
That said, the direction of your return jet may vary based on specific needs or activities. Below, I will discuss the advantages and disadvantages of positioning your jets upward or downward.
What Happens When You Point Your Return Jets Upward?
There is a common misconception regarding the ideal positioning of swimming pool jets. Many assume that aiming the jets upward is the best choice, as it creates a swirling effect on the water’s surface where debris tends to accumulate. This logic suggests that such motion would help the skimmer catch floating particles like insects, leaves, and other debris. However, this assumption is misleading.
My Experiment with Upward Pointing Jets
In June, when cottonwood trees release their fluffy seeds, I decided to test the effectiveness of upward-pointing return jets in my 24-foot round pool. Here’s what I observed:
- I directed my return jet toward the surface to create a swirling action for the cotton and leaves that had fallen into the pool.
- This setup generated significant waves and a whirlpool effect.
- However, the increased surface tension and continuous flow caused most of the debris to move too quickly for the skimmer to capture effectively.
- Additionally, many leaves and cottonwood particles were pushed toward the center of the pool, away from the skimmer.
- Ultimately, the upward jet position was not effective for removing surface debris.
Benefits of Pointing Jets Upward for Fun
While pointing the return jet upward may not be ideal for filtration, it can still serve some fun purposes. Here are a few reasons why you might consider using this position:
- Creates enjoyable waves and motion on the water’s surface.
- Facilitates a fun whirlpool experience for swimmers.
- Encourages movement of rafts, floats, and other toys on the surface.
- If the water temperature feels too warm, this method can help cool it slightly through evaporation.
- However, be aware that this can cause chemicals to dissipate more quickly due to increased evaporation.
| Return Jet Pointed Upward | Return Jet Pointed Downward | |
|---|---|---|
| Best Position for Filtration | X | |
| Increases Water Evaporation | X | |
| Reduces Water Temperature | X | |
| Maintains More Even Water Temperatures | X | |
| Best Water Circulation | X | |
| Calmer Water on Surface | X | |
| Best for Waves, Whirlpool, and Swirls | X | |
| Causes Chemicals to Dissipate Quicker | X |
What About Pointing the Return Jets Toward the Bottom?
While there are instances when directing the return jets upward might be desirable, for the majority of the time, I recommend pointing them toward the bottom of the pool. This method will enhance water circulation throughout your pool. If your skimmer is positioned near your return, aim the jets in the opposite direction to avoid creating currents that hinder the skimmer’s ability to filter effectively.
Here are several compelling reasons to direct your return jets downward:
- Directing the jets downward ensures optimal circulation, as they will push water deeper into the pool rather than just affecting the top few inches.
- This approach keeps the surface calm, enabling the skimmer to catch debris more effectively; if debris is in motion, it often evades the skimmer.
- The dirtiest part of a pool is typically the top few inches. By circulating cleaner water from below, you improve the skimmer’s ability to do its job.
- Fewer hot or cold spots. Circulating water from the bottom helps to create a more uniform temperature throughout the pool.
- Reduced pump running time! Efficient filtration allows you to cut down on pump operating hours, resulting in electricity savings.
- Additionally, water circulation directed toward the bottom can help dislodge debris trapped under hard-to-clean areas, such as pool ladders.
The Pool’s Surface is the Dirtiest Area
It is important to note that the top 3 to 5 inches of your pool’s surface is often the dirtiest due to windborne debris. This is precisely why skimmers are situated at the surface level; placing them deeper would only exacerbate the problem of accumulating dirt and debris.
Leaves, grass, and bugs continually enter the pool, floating on the surface until they eventually sink. Even if the bottom appears clean, remember that just a quarter-inch above the floor, the water is much clearer than that on the surface. This illustrates why directing your return jets toward the bottom of the pool is significantly more beneficial. When jets stir up dirty water on the surface, it complicates the skimmer’s ability to capture debris effectively, and some debris may even sink, further contaminating the pool floor. If you’ve had challenges with surface cleanliness, try adjusting your jets toward the deep end and observe any improvements.
Regular Backwashing for Optimal Circulation
For more tips on enhancing your pool’s circulation, check out my other article. To maintain clean, sparkling water, frequent backwashing of your sand filter is crucial. If you’re using a cartridge filter, inspect it regularly and rinse it between changes to ensure maximum water flow through the pump and filter.
During peak swimming season, I recommend cleaning the filter approximately once a week. In areas with abundant cottonwood trees, you may find that more frequent cleaning is necessary, as skimmer baskets can quickly become clogged, reducing water flow and filtration effectiveness. By keeping your filter clean and directing water flow toward the middle and bottom of the pool, you can significantly enhance your pool’s overall filtration and cleanliness.