Understanding Pool Filters: Why Cartridge Filters Lead the Pack
When it comes to maintaining crystal-clear pool water, your filtration system is the unsung hero. Whether you’re a new pool owner or a seasoned swimmer, understanding the three primary types of pool filters—cartridge, diatomaceous earth (DE), and sand filters—can help you make the best choice for your pool and your lifestyle.
At Nova Pool Care, we believe informed pool ownership is empowered pool ownership. Here’s what you need to know.
Sand Filters: Simple and Reliable
Sand filters are often considered the “workhorses” of the pool industry. They use a bed of specially graded sand to trap particles as water passes through.
Pros:
Low upfront cost
Simple operation
Long filter media lifespan (5–7 years)
Cons:
Less effective at capturing very small particles (filters down to 20–40 microns)
Requires frequent backwashing, which wastes water and chemicals
Large footprint
Ideal for: Larger commercial pools or homeowners looking for a low-maintenance, budget-friendly option with less concern for ultra-fine filtration.
DE Filters: Precision Filtration
Diatomaceous Earth (DE) filters use a fine, powdery substance derived from fossilized algae. These filters are known for delivering the finest filtration available, catching particles as small as 2–5 microns.
Pros:
Exceptional water clarity
Fast-acting filtration
Ideal for demanding pool conditions
Cons:
Most complex to maintain
Requires regular backwashing and recharging with DE powder
Higher cost and more maintenance-sensitive
Ideal for: Pool owners who prioritize maximum water clarity and don’t mind a more involved maintenance routine.
Cartridge Filters: Efficient, and Eco-Friendly
Now, let’s talk about the cartridge filter— an increasingly popular choice among homeowners.
Cartridge filters use a pleated polyester material to trap dirt and debris, providing excellent filtration performance without the need for backwashing.
Pros:
Filters particles down to 10–15 microns
No backwashing = water savings + chemical retention
Compact design with easy maintenance
Energy-efficient due to lower operating pressure
Cons:
Cartridges must be manually cleaned every few weeks (depending on use)
Higher initial cost than sand filters
What makes cartridge filters particularly appealing is their balance of performance, maintenance, and sustainability. They offer better filtration than sand, require less maintenance than DE, and help conserve water—an especially important consideration for eco-conscious pool owners.
They’re also versatile, working beautifully with both in-ground and above-ground pools. Whether you're a weekend swimmer or hosting frequent pool parties, cartridge filters provide the reliability and performance to keep your pool sparkling with minimal fuss.
Replacement Recommendations: Stay Ahead of the Curve
To maintain peak filtration performance and water clarity, it’s important to replace your pool filter media on schedule. Here are our expert guidelines:
Cartridge Filters: Replace every 1–3 years, depending on usage, water chemistry, and cleaning frequency. Signs it's time? Increased pressure, frequent cleanings, or poor water quality.
Sand Filters: Replace sand every 5–7 years. If your water stays cloudy despite proper chemistry, it may be time for fresh sand.
DE Filters: Internal grids should be inspected annually and replaced every 5–10 years, or sooner if there are cracks or excessive wear.
Final Thoughts
Choosing the right filter can make all the difference in your pool ownership experience. At Nova Pool Care, LLC, we often recommend cartridge filters to homeowners who want high performance with lower maintenance—and who value water conservation as part of responsible pool care.
Need help selecting or replacing a filter? Reach out to the experts at Nova Pool Care. We’ll help you filter out the confusion—and keep your water clear all year long.
Nova Pool Care, LLC
Professional. Reliable. Crystal Clear Every Time.
