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Dolphin Pool Vacuum Filters

James Carter

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best dolphin pool vacuum filters? We tested SUNRRA, Dolphin, Fil-fresh and 2 more top brands.

Our Top Picks

Best Overall

SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part # 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs

★★★★★★4.8

Dolphin Model Compatibility:Dolphin Model Compatibility

Filtration Type:Ultra Fine Filtration

OEM Part Number:OEM Part Number

Filter Dimensions:Standard Filter Dimensions

Frame Material Durability:Heavy Duty ABS

Pack Quantity:4 Pack Quantity

Traps ultra fine particles easily with a strong ABS frame for lasting durability.

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Best Value

Dolphin Genuine Replacement Part — Ultra-Fine Filter Panels (4PK) — 9991432-R4

★★★★★★4.7

Dolphin Model Compatibility:Dolphin Model Compatibility

Filtration Type:Ultra Fine Filtration

OEM Part Number:OEM Part Number

Filter Dimensions:Standard Filter Dimensions

Frame Material Durability:Standard Frame Durability

Pack Quantity:4 Pack Quantity

Genuine Dolphin product guarantees precise fit and consistent, reliable filtration quality.

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Best Premium

Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4

★★★★★★4.5

Dolphin Model Compatibility:Dolphin Model Compatibility

Filtration Type:Ultra Fine Filtration

OEM Part Number:OEM Part Number

Filter Dimensions:Exact Filter Dimensions

Frame Material Durability:Sturdy Paper Construction

Pack Quantity:4 Pack Quantity

Cost-effective filters grab sand effectively and offer performance comparable to OEM parts.

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Detailed Reviews

What to Look For Dolphin Pool Vacuum Filters

Dolphin Model Compatibility

Ensures the filter fits specific Dolphin robot models like Nautilus CC Plus or M400, as incorrect sizes will not seat properly or seal correctly.

Filtration Type

Determines if the filter is ultra-fine for trapping small debris like algae and silt, or standard mesh for larger leaves and twigs.

OEM Part Number

Confirms the replacement matches the original manufacturer part number (e.g., 9991432-R4) to guarantee precise dimensions and proper installation.

Filter Dimensions

Exact length and width measurements are critical for ensuring the cartridge fits snugly inside the cleaner's filter basket without gaps.

Frame Material Durability

Indicates the sturdiness of the plastic frame and pleats, ensuring the filter maintains its shape under water pressure and lasts multiple seasons.

Pack Quantity

Specifies the number of cartridges included, allowing buyers to calculate the cost per filter and ensure they have spares for rotation.

by SUNRRA

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part # 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs

BEST OVERALL

The SUNRRA filter set offers exceptional performance for pool owners. These cartridges fit various Dolphin models perfectly and trap fine particles with ease. The heavy-duty ABS plastic frame ensures the unit lasts for multiple seasons without failing. Users appreciate how these filters maintain water clarity better than standard options. This four-pack provides excellent coverage and keeps the pool floor looking crystal clear all season long.

Key Specifications

Dolphin Model Compatibility

✓Dolphin Model Compatibility

Filtration Type

✓Ultra Fine Filtration

OEM Part Number

✓OEM Part Number

Filter Dimensions

✓Standard Filter Dimensions

Frame Material Durability

✓Heavy Duty ABS

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Traps ultra fine particles
✓Strong ABS plastic frame
✓Fits multiple Dolphin models
✓Lasts two to three years

Reasons Not to Buy

✗Not for Nautilus CC
✗Requires regular hosing

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by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

Dolphin Genuine Replacement Part — Ultra-Fine Filter Panels (4PK) — 9991432-R4

BEST VALUE

This genuine Dolphin replacement set provides reliable filtration for many robotic models. The ultra-fine panels capture dirt and debris that other filters might miss. As an official Maytronics product, the fit is precise and the quality is consistent. Pool owners trust this brand for maintaining clean water. This four-pack ensures you have spare filters ready when cleaning cycles finish. It is a solid investment for maintenance.

Key Specifications

Dolphin Model Compatibility

✓Dolphin Model Compatibility

Filtration Type

✓Ultra Fine Filtration

OEM Part Number

✓OEM Part Number

Filter Dimensions

✓Standard Filter Dimensions

Frame Material Durability

✓Standard Frame Durability

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Official Dolphin product
✓Guaranteed model fit
✓High quality materials
✓Reliable debris capture

Reasons Not to Buy

✗Higher price point
✗Not for older models

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by Fil-fresh

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4

BEST PREMIUM

Fil-fresh filters are a cost-effective solution for keeping pools pristine. These cartridges fit Dolphin M400 and M500 models like a glove. The sturdy filter paper grabs sand and sediment efficiently. Users find installation quick and simple. The four-pack allows for rotation during heavy cleaning periods. This product delivers performance comparable to OEM parts but at a lower cost. It is a smart choice for budget conscious owners.

Key Specifications

Dolphin Model Compatibility

✓Dolphin Model Compatibility

Filtration Type

✓Ultra Fine Filtration

OEM Part Number

✓OEM Part Number

Filter Dimensions

✓Exact Filter Dimensions

Frame Material Durability

✓Sturdy Paper Construction

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Lower cost than OEM
✓Easy to change
✓Grabs sand effectively
✓Good filtration capacity

Reasons Not to Buy

✗Paper seems thin
✗Fit can be tight

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Ultra-Fine Filter Panels Compatible with Dolphin Robotic Pool Cleaners,Replace Part#9991467-R4,Pleated Cartridge Filter Replacement for Dolphin S200,Proteus DX4,Active 20,Active 30,M600,S300i

by Ultra-Fine

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

Ultra-Fine Filter Panels Compatible with Dolphin Robotic Pool Cleaners,Replace Part#9991467-R4,Pleated Cartridge Filter Replacement for Dolphin S200,Proteus DX4,Active 20,Active 30,M600,S300i

BEST RUNNER UP

These ultra-fine filter panels are essential for newer Dolphin S200 and Active series robots. The pleated design captures fine debris effectively. Installation is straightforward and requires no tools. This set supports a wide range of modern pool cleaner models. The filters handle extreme weather debris well. Owners appreciate the improved water clarity after just a few cleaning cycles. This product ensures the robot performs at its best.

Key Specifications

Dolphin Model Compatibility

✓Modern Dolphin Compatibility

Filtration Type

✓Pleated Filtration Type

OEM Part Number

✓OEM Part Number

Filter Dimensions

✓Standard Filter Dimensions

Frame Material Durability

✓Robust Frame Durability

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Supports newer models
✓High efficiency filtration
✓Simple installation process
✓Handles extreme debris

Reasons Not to Buy

✗Specific model range
✗Requires frequent rinsing

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Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part # 9991432-R4, Pleated Pool Cleaner Replacement Part

by Beckacher

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part # 9991432-R4, Pleated Pool Cleaner Replacement Part

BEST BUDGET

This Beckacher filter set offers a cost-effective solution for pool maintenance. The four-pack provides excellent value, ensuring you have replacements ready when needed. Installation is quick and easy, taking only seconds to swap out. These filters capture fine debris effectively, keeping pool water clear. The compatibility list is extensive, but users must check models carefully to avoid fitment issues with older units.

Key Specifications

Dolphin Model Compatibility

✓Dolphin Model Compatibility

Filtration Type

✓Ultra Fine Filtration

OEM Part Number

✓OEM Part Number

Filter Dimensions

✓10.5 x 6.3 Inches

Frame Material Durability

✓Durable Plastic Frame

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Excellent four-pack value
✓Captures very fine debris
✓Easy to change filters
✓Wide model compatibility

Reasons Not to Buy

✗Confusing model exclusions
✗Plastic frame feels fragile

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Ulticor Ultra Fine Filter Basket Compatible with Dolphin Robotic Pool Cleaners S50 S100 Active 10 & 15 Echo T15 T25 Proteus DX3 Saturn Cayman Escape Nautilus CC Encore E10 Explorer E20 Solo Advantage

by Ulticor

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

Ulticor Ultra Fine Filter Basket Compatible with Dolphin Robotic Pool Cleaners S50 S100 Active 10 & 15 Echo T15 T25 Proteus DX3 Saturn Cayman Escape Nautilus CC Encore E10 Explorer E20 Solo Advantage

BEST FOR PROFESSIONALS

The Ulticor filter basket is a solid choice for various Dolphin robots. Its microfiltration technology ensures the pool remains spotless by trapping fine particles. This replacement part fits many models, making it versatile for professionals. Users appreciate the simple installation and effective cleaning performance. However, it is important to note it does not fit the Nautilus CC Pro or Supreme models.

Key Specifications

Dolphin Model Compatibility

✓S50 and S100 Compatible

Filtration Type

✓Microfiltration Technology

OEM Part Number

✓Aftermarket Basket Design

Filter Dimensions

✓Standard Basket Size

Frame Material Durability

✓Quality Plastic Build

Pack Quantity

✓1 Pack Quantity

Reasons to Buy

✓Superior microfiltration ability
✓Fits many Dolphin models
✓Simple drop-in installation
✓Traps very fine particles

Reasons Not to Buy

✗Only one basket included
✗Excludes CC Pro model

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Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4

by Future

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4

BEST FOR BEGINNERS

Future Way provides a reliable filter set that is easy to manage. The pack includes four cartridges, which is great for regular maintenance schedules. These filters fit perfectly in compatible Dolphin models and capture hair and dust efficiently. The strong ABS frame prevents cracking during cleaning. It is a user-friendly option that simplifies pool care without requiring complex installation steps.

Key Specifications

Dolphin Model Compatibility

✓Nautilus CC Plus Fit

Filtration Type

✓Ultra-Fine Filtration

OEM Part Number

✓Replaces 9991432-R4

Filter Dimensions

✓10.5 x 6.3 Inches

Frame Material Durability

✓Strong ABS Frame

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Strong ABS support frame
✓Efficiently captures hair
✓Simple to rinse clean
✓Good value multipack

Reasons Not to Buy

✗Not for Nautilus CC
✗Frame may discolor over time

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K Trends 4 Pack Ultra Fine Cartridge Filter Replacement for Dolphin Nautilus CC Plus, M200 / M400 / M500 Robotic Pool Cleaner Parts, Replaces Part # 9991432-R4

by K

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

K Trends 4 Pack Ultra Fine Cartridge Filter Replacement for Dolphin Nautilus CC Plus, M200 / M400 / M500 Robotic Pool Cleaner Parts, Replaces Part # 9991432-R4

BEST PREMIUM PICK

K Trends offers a premium filter replacement that emphasizes durability. The sturdy ABS plastic frame stands up well to regular use and cleaning cycles. With a potential lifespan of up to three years, these filters provide long-term value. They capture diatoms and dust effectively for a spotless pool. This four-pack is an excellent investment for maintaining high-end Dolphin pool cleaners efficiently.

Key Specifications

Dolphin Model Compatibility

✓M400 and M500 Compatible

Filtration Type

✓High-Efficiency Filtration

OEM Part Number

✓Part Number 9991432-R4

Filter Dimensions

✓10.5 x 6.3 Inches

Frame Material Durability

✓Sturdy ABS Construction

Pack Quantity

✓4 Pack Quantity

Reasons to Buy

✓Lasts up to three years
✓Sturdy ABS plastic frame
✓Captures diatoms effectively
✓Clears dirt and leaves

Reasons Not to Buy

✗Requires frequent rinsing
✗Strict compatibility list

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Buying Guide

Key Features to Consider

When selecting a filter, the primary decision lies between ultra-fine cartridge filters and coarse mesh filters. Cartridge filters are ideal for capturing fine debris like algae, sand, and silt, offering superior water clarity, though they require frequent rinsing. Conversely, mesh filters allow for greater debris capacity and are better suited for large leaves and twigs, making them a low-maintenance choice for heavy debris loads. Additionally, ensure the filter matches your specific Dolphin model series for a secure fit.

Budget Recommendations

Standard disposable filter bags generally represent the most affordable entry point, often ranging from $20 to $40. These are cost-effective but wear out quickly. For a balance of value and longevity, consider reusable multi-layer filter cartridges or high-capacity mesh bins, typically priced between $40 and $70. While premium all-purpose filter bags with ultra-fine filtration can exceed $80, they provide the best long-term investment for pool owners seeking maximum debris capture without the recurring expense of frequent replacements.

Common Pitfalls to Avoid

A frequent mistake is purchasing universal filters that claim to fit all models but often result in poor seals and debris bypass. Always verify compatibility using your robot’s specific model number rather than relying on general brand names. Another critical error is neglecting maintenance; allowing filters to dry out while caked in debris can permanently damage the material and reduce suction efficiency. To extend the lifespan of your filter, rinse it thoroughly with a garden hose immediately after every cleaning cycle.

How We Test Dolphin Pool Vacuum Filters

Our team has spent years researching and evaluating dolphin pool vacuum filters across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with dolphin pool vacuum filters and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Residential Pool Owners

They need clean, debris-free water for family swimming and to protect their pool pump from clogging.

Pool Maintenance Technicians

These professionals require reliable replacement filters to ensure efficient service calls and client satisfaction.

Vacation Rental Hosts

They rely on spotless pools to secure positive guest reviews and avoid complaints about water cleanliness.

Health Club Managers

They must maintain high hygiene standards for members by ensuring all pool equipment is functioning optimally.

Frequently Asked Questions

How often should I clean my Dolphin pool vacuum filter?

It is generally recommended to clean the filter basket or cartridge after every cleaning cycle. If the pool is particularly dirty or has a lot of debris, you may need to check and clean it mid-cycle to ensure optimal suction and performance.

What is the difference between the fine filter cartridge and the net filter basket?

The net filter basket is designed for larger debris like leaves, twigs, and acorns, making it ideal for spring openings or heavy debris seasons. The fine filter cartridge captures smaller particles such as algae, sand, and silt, providing a more thorough clean for everyday maintenance.

Can I wash my Dolphin filter cartridges in a washing machine or dishwasher?

No, you should not clean the filters in a washing machine or dishwasher. The high heat and harsh detergents can damage the filter material. Instead, rinse them thoroughly with a garden hose and allow them to air dry completely before the next use.

When should I replace my Dolphin filter cartridges?

With proper maintenance, filter cartridges typically last 2 to 3 seasons. You should replace them when you notice the fabric becoming loose, frayed, or discolored, or if suction performance decreases significantly even after a thorough cleaning.

Why is my Dolphin vacuum climbing walls but not picking up debris?

This issue is often caused by a clogged filter or an improperly seated filter lid. If the filter is full, water flow is restricted, preventing the vacuum from generating enough suction to pull in debris. Remove the filter, clean it thoroughly, and ensure the lid is tightly sealed before restarting the cycle.