Cartridge, sand or DE? Whichever your pool filtration system, we've got some selections for the best pool filter for your set-up.
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6 Best Pool Filters to Remove Dirt and Debris
Updated on Jun. 17, 2024
If you’re already enjoying the clear, refreshing water of your backyard swimming pool, you’ll want to make sure it stays that way with the best pool filter. “Pool filters are one of the most important parts of your pool, second only to the pool pump,” says Tim Mendola, the Talent Program Leader for Leslie’s, the largest direct-to-consumer pool and spa care retailer in the US. This is because filters help keep the water in your pool clean, clear and safe for swimming. “Just like you wouldn’t want to drink dirty water, you don’t want to swim in a pool full of dirt, fine debris and other microscopic contaminants that can cause the water to look cloudy,” he says.
“Cloudy water can also be incredibly dangerous for swimmers because it limits visibility and makes it challenging to see if there’s a problem underwater,” adds Mendola. There are three main types of filters: sand, diatomaceous earth (DE, in industry lingo) and cartridges. These systems are not interchangeable and they all have their pros and cons. To ensure you’re always swimming in crystal-clear waters, here’s what you need to know, along with the best options on the market.
Best DE Pool Filter
Hayward Perflex DE Pool Filter
Pros:
- Filter housing is made from durable, non-corrosive thermoplastics
- Cleans without backwashing, which saves lots of water
- Automatically removes dirt and debris from filter tubes
- From a reputable brand
Cons:
- Expensive option
Though they’re the most expensive filtration system in terms of start-up costs, DE filters are widely regarded as the best pool filter for filtering out the most minute particulates. And this Hayward Perflex filter consistently ranks among the best on the market, praised for its durability and simplicity of maintenance.
Their Perflex series of DE filters are available in different sizes based on the capacity of your pool. After periodic cleaning and backwashing (if your DE filter requires it), replenish the filter with a de-filter powder that lasts several cleaning cycles.
“I really struggled with this purchase because I knew I needed a better filter but did not want to spend that amount of money. I had to tell myself I was spending the same amount of money on new cartridges and cleaners,” writes verified purchaser Jamie. “Within a night the difference is apparent. It’s worth the purchase, trust me! My husband got it up and running easily!”
Best DE Pool Filter Runner-Up
Pentair Quad Cartridge Style DE Pool Filter
Pros:
- Extremely high degree of filtration
- Fiberglass-reinforced polypropylene tank
- Uses less power
- Longer time between cleanings
Cons:
- Very expensive
- Requires backwashing
This DE set-up from Pentair has unparalleled performance and holds four large-capacity cartridges. The neutral-colored tank blends with your yard and is built of fiberglass-reinforced polypropylene.
Amazon purchaser Glenn, who installed the Pentair Quad after a pool renovation, says that after two weeks, his pool water “is as clear as I’ve ever seen and I’ve had a pool for 30 years.” By the way, here are the best pool shock treatments to keep your pool clean, clear and sanitized.
Best Sand Pool Filter
Rx Clear Radiant Complete Sand Filter System
Pros:
- One-piece tank construction ensures against leaks
- Available in four sizes, from 16- to 24-inches
- Works with in-ground pools
- Easy to install and operate
Cons:
- Hoses are sold separately
- Cannot be shipped to Florida or California
Sand filter systems are the least expensive among common filtration systems. Many lack the capacity for in-ground pools, but not these options from Rx Clear. The largest of their Radiant Complete filter systems handles up to 33,000 gallons of water, enough for even large in-ground pools. The system includes a pool pump, meaning there’s no additional, pricey equipment to buy.
Subsequently, the sand lasts three to five years, which is good news for pool owners with a sand filtration system. When it’s time to change, this silica filter sand is a stand-out pick for its lack of residue after backwashing.
“This filter can’t be beaten for the price,” writes Michael L. in his five-star review. “I’ve seen plenty of pumps and this is equivalent to the more expensive pumps sold by the pool stores. You will not be disappointed. For a hundred bucks more than the cheaper version it will be money well spent.”
Best Sand Pool Filter Runner-Up
XtremepowerUS Multi-Port Sand Filter System
Pros:
- Multi-port valve for ease of use
- Value-priced
- Works for above-ground or in-ground pools
- Very highly rated
Cons:
- Some users say assembly instructions are poor
- Not suitable for larger swimming pools
If you’re shopping for a sand filter, it’s hard to beat the price-to-quality ratio of this multi-port model. We appreciate the sturdy construction, easy-to-navigate controls for backwashing, circulating, draining and winterizing, and that it’s suitable for a pool of up to 24,000 gallons.
Verified purchaser, Ed, writes in his five-star review, “In the past, I have had DE, cartridge and sand filters on pools. The DE and cartridge filter require more maintenance. A sand filter seemed to be the answer to my pool problems. I am happy with the way this filter is working. Installation was a breeze and my pool was clear in no time. This filter has performed as well as I hoped it would.”
Best Cartridge Pool Filter
Hayward SwimClear Plus Cartridge Pool Filter
Pros:
- Good price-to-quality ratio
- Easy installation and access to filter cartridges for cleaning
- Compatible with most pool pumps
- Extra-length cartridge provides extra strength and maximum flow
Cons:
- Not large enough for pools greater than 18,000 gallons
- Some reviewers report that metal parts are prone to rust
It’s easy to find small-capacity cartridge filter systems for hot tubs and above-ground pools. But for a durable, large-capacity cartridge pool filter for an in-ground pool, Hayward once again gets top marks for quality. Its SwimClear cartridge filter is available in three sizes, with the largest having enough filter capacity for a 15,000- to 18,000-gallon pool.
The durable construction of the filter housing stands up to extreme heat, so it’s an excellent choice for a southern or desert location. This cartridge filter likely requires type A/C replacement filters. Additionally, these highly rated, reusable pool filter cartridges extend the time between filter changes.
Best Cartridge Pool Filter Runner-Up
Jacuzzi In-Ground Cartridge Filter
Pros:
- Fiberglass reinforced polypropylene tank stands up to the elements
- Easy open-close function
- Backwashing not required
- Two-year warranty
Cons:
- Very expensive
This in-ground cartridge filter system wins high marks for its superior filtration thanks to four high-quality cartridge filters and a total of 425 square feet of filter media. Furthermore, this model reduces water consumption and requires less maintenance than similar cartridge filters. Consequently, this filter is more energy efficient over time.
Types of Pool Filters
- Cartridge filters: Suitable for in-ground and above-ground pools, these filters cycle water through cylindrical, pleated filters, which capture debris and minute particulate. “They are easy to clean and maintain,” notes Mendola. “The biggest benefit is that they don’t require backwashing, which can save thousands of gallons of water per year. However, the cartridges can be more expensive to replace when they wear out.”
- Sand filters: Sand filters push water through sand in the filter housing, which captures debris and particulate. “Sand filters are popular because they cost the least to purchase and maintain, they’re simple to use and their level of maintenance is relatively low,” says Mendola. However, sand is the least efficient filter media, he warns.
- DE (diatomaceous earth) filters: Mendola explains that using naturally occurring sedimentary rock powder as the filtering agent, DE filters provide the cleanest water because they can remove the smallest debris from your pool. Just be aware, he says, “They’re the most costly to purchase, they require more diligent maintenance, and there are health and safety risks involved if you don’t handle the DE filter powder correctly.”
What to Consider When Buying a Pool Filter
- Size: “Make sure the filter you choose is the right size for your pool so it can clean the water effectively,” advises Mendola.
- Maintenance: Consider your desired level of upkeep, says Mendola, especially if you’ll be doing your own pool maintenance and cleaning. “If you don’t want to spend a lot of time cleaning and maintaining your filter, you might prefer a cartridge or sand filter over a DE filter,” he suggests.
- Filtration efficiency: According to Mendola, if the best filtration is your highest priority, go for a DE or cartridge filter.
- Price: “When it comes to budget, consider the purchase price, but also consider the cost of replacement parts and how often the filter media needs to be changed. All of this should play a role in your final decision,” he adds.
Why You Should Trust Us
With extensive experience as a freelance writer, I’ve written numerous articles on pool and outdoor topics for Family Handyman and other reputable outlets like The Washington Post and Travel + Leisure. Based in rural Umbria, Italy, I bring a unique perspective shaped by my hands-on involvement in home improvement projects alongside my stonemason husband. This firsthand experience makes me well-suited to test and review various home products, providing readers with honest and insightful reviews.
For additional insights, we consulted Tim Mendola, the Talent Program Leader for Leslie’s, the US’s largest direct-to-consumer pool and spa care retailer. With over 14 years at Leslie’s, Mendola creates and implements all training development and talent management focused on pools, equipment, water and chemistry. His extensive experience and expertise provided invaluable information for our article.
How We Found the Best Pool Filters
We began with fundamental research and reporting on pool filters to find the best. We examined their materials, compatibility with different pool sizes and pricing to ensure we only recommended products that offered genuine value. Next, we delved into the features that contribute to the filter’s quality, ease of use, and installation process. Finally, we consulted an industry pro and then meticulously sifted through user reviews to see how real individuals and pools interacted with the filter, assessing its performance and durability under real-world conditions.
FAQ
What is the most effective pool filter?
According to Mendola, a DE filter is the most effective pool filter. “It can trap the smallest particles, which means it keeps your pool water extremely clean and clear. While it requires more maintenance and is the most expensive option, it does the best job of filtering out even the tiniest bits of dirt and debris. Cartridge filters offer a nice middle ground between DE and sand filters for effectiveness, maintenance and cost.
What is the lowest maintenance pool filter?
The lowest maintenance option is the sand filter. Mendola explains: “Sand filters are pretty easy to use because you only need to backwash them occasionally to clean out the dirt and debris. Backwashing the filter is simple and only requires changing the filter valve position before turning the pump on high speed for a few minutes. The sand inside the filter only needs to be replaced every three to five years or so, making it a low-maintenance option compared to other filter types. With good water chemistry and routine deep cleaning, the filter sand may last even longer.”
What is the lifespan of a pool filter?
This depends on the type of filter, and regular cleaning and proper maintenance will help extend the life of any pool filter. “Using pool enzymes and chemicals specifically formulated for filter cleaning can also help prolong the lifespan of your filter media,” says Mendola. Cartridges typically last two to three years, while sand filters usually last around three to five years. According to Mendola, DE filter powder needs to be replenished with each backwash, but the filter grids can last four to five years or more.
