Pool Cleaner Filter

Pool cleaner filters are essential components that trap debris and contaminants from your pool water. You'll find them in three main types: cartridge, sand, and diatomaceous earth (DE) filters, typically priced between $200-$1,500 depending on size and quality. When choosing a filter for your automatic pool cleaner, look for compatibility with your existing system, appropriate micron rating for your debris type, and sufficient capacity for your pool size. Most filters require replacement or cleaning every 2-6 months depending on pool usage and local conditions.

What is a pool cleaner filter?

A pool cleaner filter is the component responsible for trapping and removing debris, dirt, and contaminants from your swimming pool water. It works alongside your pool cleaner (whether robotic, suction, or pressure-side) to maintain water clarity and prevent damage to your pool's circulation system.

Pool filters come in three primary types, each with specific filtration capabilities:

1. Cartridge filters - These use pleated polyester or paper elements to trap particles as small as 10-15 microns. They're the most common type for residential pools, offering good filtration without backwashing requirements.

2. Sand filters - Utilizing special pool-grade sand, these filters trap particles down to about 20-40 microns. They're durable, relatively inexpensive, but require periodic backwashing and sand replacement every 5-7 years.

3. DE (Diatomaceous Earth) filters - These provide the finest filtration (down to 2-5 microns) using fossilized diatom skeletons. While offering superior water clarity, they're more expensive and require more maintenance.

For context, a human hair is about 50-70 microns thick, so these filters can trap particles much smaller than what's visible to the naked eye.

The filter component is often integrated with popular pool cleaner brands like Hayward, Zodiac, Polaris, and Pentair, but you can also find universal replacement filters that work across multiple models.

Filter types and their applications

Pool cleaner filter vs. main pool filter

While your pool's main filtration system handles the overall water circulation, pool cleaner filters provide additional filtration specific to the cleaning device. For inground pools, it's common to have both systems working together—the main filter handling general water clarity while the cleaner filter captures debris from the pool floor and walls.

For pool cleaning vacuums and automatic cleaners like Hayward or Zodiac models, the internal filter bag or cartridge serves as the first line of defense, catching larger debris before it reaches your main filtration system. This reduces the strain on your main filter and extends its life.

How it works

Pool cleaner filters operate through either water pressure or vacuum action to trap debris as water passes through the filter media.

The filtration process

1. Water intake - Your pool cleaner draws water through its intake port, often aided by a brush or rotating cleaning head that loosens debris from surfaces.

2. Pre-filtering - Large debris like leaves and twigs are caught in a collection bag or basket before reaching the main filter.

3. Main filtration - Water passes through the filter media (cartridge, sand, or DE), which traps fine particles.

4. Water return - Filtered water returns to your pool.

The effectiveness of this process depends on the filter's design, media type, and surface area. A larger filter surface area means better filtration and less frequent cleaning.

Signs your pool cleaner filter needs attention

The filter is working properly when your pool water is clear and your cleaner moves efficiently. You'll know it's time for maintenance when:

• Your pool cleaner moves slower than usual
• Water flow decreases noticeably
• Pressure gauge readings increase on pressure-side systems
• Visible debris escapes from the cleaner
• The pool water becomes cloudy despite regular cleaning cycles

For Hayward pool cleaners with Navigator or PoolVac systems, the manufacturer recommends checking the filter after every use and doing a deep clean monthly during heavy use seasons.

Choosing the right filter for your pool cleaner

Selecting the appropriate filter for your specific pool setup involves considering several factors:

Pool type and size considerations

For inground pools, more powerful cleaners with larger filter capacities are typically required. Pools surrounded by trees or in windy areas accumulate more debris and benefit from larger filter capacity.

Standard-sized residential inground pools (15,000-30,000 gallons) generally work well with medium-capacity filters that balance efficiency with maintenance frequency. Larger pools may require commercial-grade filtration systems with higher flow rates and debris capacity.

Compatibility with popular pool cleaner brands

Most major brands design their cleaners and filters as systems:

• Hayward pool cleaners typically use their own cartridge or canister filters, with the PowerFlo series being popular for above-ground pools and the Super Pump series for inground pools.

• Zodiac/Polaris cleaners often use their own filter bags for their pressure-side cleaners like the popular Polaris 360 and 380 models.

• Dolphin/Maytronics robotic cleaners include built-in filter cartridges or bags that are specific to each model.

Budget considerations

Your filter budget should account for:

• Initial investment: $200-$1,500 for the filter system
• Replacement media: $40-$200 annually for cartridges or DE
• Energy costs: More efficient filters may cost more upfront but save on electricity
• Water usage: Backwashing sand filters uses 200-300 gallons of water each time

A mid-range cartridge filter system ($300-$500) offers good value for most homeowners, balancing filtration quality with reasonable maintenance requirements.

Installation and maintenance

Proper installation and regular maintenance extend your filter's life and ensure optimal performance.

Installation basics

For most residential pool cleaners, filter installation follows these steps:

1. Ensure all components match your specific cleaner model
2. Connect the filter to the cleaner according to manufacturer instructions
3. Verify proper water flow after installation
4. Check for leaks at connection points

Pool cleaning heads and vacuum attachments typically connect directly to your existing filter system, while standalone cleaners like Zodiac or Hayward models may have their own dedicated filter components.

Cleaning and maintenance schedule

For optimal performance:

• Weekly: Visual inspection of filter components
• Bi-weekly to monthly: Clean or rinse cartridge filters (more often with heavy use)
• Seasonal: Deep clean all components before storage
• Annually: Evaluate filter media for replacement

To clean a cartridge filter:
1. Remove the cartridge from housing
2. Rinse with garden hose at 45° angle to remove debris between pleats
3. For deeper cleaning, soak overnight in a filter cleaning solution
4. Rinse thoroughly and allow to dry before reinstallation

Sand filters require backwashing when pressure rises 8-10 PSI above the clean reading, while DE filters need backwashing plus replenishing of DE powder.

Troubleshooting common filter problems

Even well-maintained filters can develop issues. Here are solutions to common problems:

Clogged filters

Symptoms: Reduced cleaning effectiveness, slower cleaner movement, higher pressure readings
Solutions:
- Remove and clean the filter according to manufacturer instructions
- Check for tears or damage that might allow debris to bypass the filter
- Ensure proper reassembly after cleaning

For stubborn clogs in Hayward or Zodiac systems, soaking the filter overnight in a specialized cleaner can break down oils and fine particles that regular rinsing misses.

Torn or damaged filters

Symptoms: Debris returning to the pool, cloudy water despite recent filter cleaning
Solutions:
- Replace damaged cartridges or filter bags immediately
- Check for sharp objects in the pool that might cause tears
- Consider using a pre-filter sock for additional protection

Water flow issues

Symptoms: Pool cleaner stopping or moving erratically, air in the system
Solutions:
- Verify pump and filter are properly sized for your pool cleaner
- Check for air leaks in connections
- Ensure water level in pool is adequate
- Clean skimmer and pump baskets

A pool vac head that moves sluggishly usually indicates insufficient water flow, often caused by a clogged filter or pump basket.

Optimizing your pool cleaning system

Beyond basic functionality, you can enhance your filtration system's effectiveness:

Complementary equipment

Consider adding:
- Pre-filters: Capture larger debris before it reaches your main filter
- Pool skimmers: Reduce surface debris that eventually sinks to the bottom
- Automatic water levelers: Maintain proper water level for optimal cleaner performance

Seasonal adjustments

• Spring/Summer: Increase cleaning frequency during heavy use periods
• Fall: Use leaf canisters or larger filter bags when leaves are falling
• Winter: Clean and store filter components properly in freezing climates

Frequently Asked Questions

How often should I replace my pool cleaner filter?

Cartridge filters typically last 1-2 years before replacement, depending on use and maintenance. Sand filter media should be replaced every 5-7 years, while DE grids may last 2-3 years. For popular brands like Hayward pool cleaners, check your specific model's manual as some premium filters are designed to last longer with proper care.

Can I use a generic filter in my pool cleaner?

Many aftermarket filters are manufactured to fit popular cleaners. For best results, match the micron rating and dimensions to your original filter. Using generics with Zodiac or Polaris cleaners sometimes works, but genuine parts typically offer better fit and performance. Always verify compatibility before purchasing.

Why is my pool still dirty after cleaning the filter?

Several issues could cause this: your filter might be damaged and allowing debris to pass through, your cleaning cycle might be too short for your pool's needs, or you might have algae growth that requires chemical treatment rather than mechanical filtration. For robotic cleaners, check if the cleaning pattern covers your entire pool effectively.

How do I know what size filter I need for my pool?

Filter sizing depends on your pool volume, usage, and environment. As a general rule, a filter should be able to process your entire pool volume in 8-10 hours. For a typical 20,000-gallon residential pool, look for systems rated at approximately 40-50 GPM (gallons per minute). Inground pools with heavy debris benefit from oversizing the filter by 20-30%.

Are pool cleaner filters different for inground vs. above-ground pools?

Yes, inground pool cleaners typically require more robust filtration systems due to larger water volumes and potentially more debris. Above-ground pool cleaners often use smaller, simpler filtration systems. The connection types and pressure ratings may also differ between the two applications.

Can I run my pool cleaner without a filter?

This is strongly discouraged. Running without a filter risks damaging your cleaner's motor and pump by allowing debris to enter the internal components. It also pushes the filtering burden entirely to your main pool filter, potentially shortening its life and reducing efficiency.

How do I clean DE filter grids?

To clean DE filter grids, first backwash the system according to manufacturer instructions. Then shut off the pump, release pressure, open the filter tank, and remove the grids. Spray each grid with a garden hose, focusing on removing caked-on DE powder and debris. For deep cleaning, soak in a commercial filter cleaner overnight. Rinse thoroughly before reassembling and adding fresh DE powder.