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Pool Filters & Accessories

Pool Filters - The Doheny's Difference

Swimming pool filters are a vital component when it comes to the cleanliness and overall maintenance of your pool. While chemicals and sanitizers kill the bacteria and algae in your pool, it’s your filter that removes the debris from your water. Without it, your water would quickly become cloudy. When looking for the perfect swimming pool filtration system, consider all the different qualities your pool has: water capacity, geographic location, maintenance needs, and how often your swimming pool is used. Doheny's Pool Supplies Fast is your #1 stop for pool filters, filter media, valves, and replacement cartridges. Our wide selection has a filter for every pool - and budget!

Sand FiltersSand Filters
Cartridge FiltersCartridge Filters
DE FiltersDE Filters
Multi-Port ValvesMulti-Port Valves
Replacement CartridgesReplacement Cartridges
Filter MediaFilter Media

Helpful Pool Care Tips from our Knowledgeable Pool Pros see more

Video: Pool Maintenance Basics: Do's and Don'ts

Video: How to Choose the Right Pool Filter for You

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Shop For The Right Pool Filter at Doheny’s

Choosing the right pool filter system is essential for keeping your swimming pool water clean, clear, and safe. While sanitizers and other chemicals help eliminate bacteria and algae, your filter removes debris and fine particles that can cloud the water. When looking for the perfect swimming pool filtration system, consider all the different qualities your pool has: water capacity, geographic location, maintenance needs, and how often your swimming pool is used. Another thing to consider is if you have owned or used another kind of pool filter in the past, you might want to stick with it if that’s what you know. Whether you own an above ground pool or an inground pool, Doheny’s has the perfect solution. From sand filters to cartridge and DE filters, we offer a wide selection of top-rated pool filtration systems and replacement parts, all at prices that fit your budget.

Why Pool Filtration Matters

  • Improve water clarity and cleanliness
  • Reduce chemical usage by removing organic contaminants
  • Prevent algae growth and cloudy water
  • Extend the life of your pool pump and heater
  • Make routine maintenance easier and more effective

Whether you swim daily or just on weekends, a reliable filter ensures your pool stays inviting all season long.

Types of Pool Filters

Each filter type has its own strengths depending on your pool’s size, usage, and maintenance preferences. Here’s a quick overview:

Type of Pool Filter Filtration Level Maintenance Cost Ideal Use Cases
Sand Filters 20 microns Backwash as needed or every 1–2 weeks, replace sand as needed or every 5–7 years Low Budget-conscious owners, low-maintenance setups
Cartridge Filters 5–7 microns Rinse cartridge every 2–4 weeks, replace every 2–3 years Moderate Easy maintenance, water conservation
D.E. Filters 3-5 microns Backwash every 3–4 weeks, recharge with DE powder, clean grids 1–2 times/year High Filtering finest debris, premium performance

Sand Filters

A popular and economical choice, sand filters use specially-graded sand to trap particles as small as 20 microns. They’re low-maintenance and ideal for both above ground and inground pools. Sand on average needs to be replaced every 5–7 years (case-by-case), and the system requires occasional backwashing to flush out trapped debris. Shop Sand Filters →

Cartridge Filters

Effective down to 5-7 microns, cartridge pool filters work by your pump pushing water through the filter membranes, trapping debris in the cartridge fibers, and sending clean water back out to the pool. They’re also easy to maintain and clean as no backwashing is required. The cartridges need to be cleaned with a garden hose regularly and are typically replaced every 3-5 years. These filters are great for any pool type, and fit well with pool owners looking for easy maintenance and water conservation. Shop Cartridge Filters →

D.E. (Diatomaceous Earth) Filters

For the clearest water possible, DE filters are seen to be the best option. By using a very fine powder called diatomaceous earth, they are able to filter particles as small as 3-5 microns. Though the filters themselves tend to be more expensive than cartridge and sand filters, the DE powder is relatively budget-friendly. One note of caution: D.E. filters take a fair amount of time to learn how to use properly. If you have used one in the past and liked it, then stick with it. If you have previously owned a sand or cartridge filter, a D.E. filter might not be your best choice. Shop D.E. Filters →

Shop Filters by Pool Type

Choosing the right filter also depends on your pool’s design and setup. We’ve made it easy to shop by pool type:
Above Ground Pool Filters →
Inground Pool Filters →

Shop Filter Media, Valves, & Replacement Parts

To keep your filter system running at peak performance, you’ll need the right filter media and accessories. Doheny’s carries everything you need, including:

  • Pool filter sand & sand alternatives
  • Diatomaceous earth (DE) powder
  • Alternative DE media
  • Replacement cartridges
  • Multiport valves for sand and DE systems

Shop Filter Media →
Shop Replacement Cartridges →
Shop Multiport Valves →

Not Sure Which Filter to Choose?

Every pool is different, and the best filter for your setup depends on factors like water volume, climate, and how often you swim. If you’re unsure where to start:
Read our Pool Filter Buying Guide →
Or call our friendly Pool Pros at 800-574-7665 for personalized advice

Frequently Asked Questions About Pool Filters

How do I know which type of pool filter is best for me?

It depends on your maintenance preferences and budget. Sand filters are lower maintenance and affordable, cartridge filters offer finer filtration, easier maintenance, and water savings, and D.E. filters provide the clearest water with a bit more learning and upkeep.

Can I upgrade my existing pool filter system?

Yes! Many pool owners upgrade to a more efficient or higher-capacity filter system. Just make sure your new filter is compatible with your pump’s flow rate and your pool’s plumbing setup.

Do I need to replace the entire filter system or just the media?

In many cases, you can simply replace the filter media, such as sand, cartridges, or DE powder, without replacing the entire system. However, if your filter tank or internal components are worn or damaged, a full replacement may be necessary.

How often should I run my pool filter?

We recommend running your pool filter 24/7 during pool season. This helps to prevent water stagnation, keeping your water clean, clear, and void of any algae blooms.

What’s the difference between a filter and a pump?

The pump circulates water through your pool system, while the filter removes debris from the water. Both are essential for keeping your pool clean and balanced.

Can I use the same filter for a saltwater pool?

Yes. All filters are compatible with any pool and any sanitizer.

Filters Guides

  • Picking a Pool Filter

    Are you looking for the right pool filter to keep your swimming pool sparkling clean? With so many different types of pool filters available, choosing the right one can be overwhelming to say the least. But don’t stress; this handy pool filter buying guide will help you decide which swimming pool filter is the right one for you. After all, a good pool filter is an essential part of a clean, healthy pool.

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