Why I Switched to Pentair FNS Plus 36 Filter Grids: My Personal Experience and Expert Insights

When it comes to maintaining a crystal-clear swimming pool, I’ve learned that the right filtration system makes all the difference. One standout component that has consistently impressed me is the Pentair FNS Plus 36 Filter Grids. These innovative filtration grids have been engineered to provide exceptional clarity and efficiency, ensuring that every swim is as refreshing as it is inviting. With their unique design and robust performance, the FNS Plus 36 grids not only enhance the cleanliness of your pool but also simplify the maintenance process, allowing you to spend more time enjoying the water and less time worrying about it. Join me as we dive into the remarkable features and benefits of the Pentair FNS Plus 36 Filter Grids, and discover why they are a top choice for pool owners seeking unparalleled quality and performance.

I Personally Tested The Pentair FNS Plus 36 Filter Grids And Here Are My Honest Recommendations

1. Cryspool® 1003 DE Filter Compatible with DE3620(DEX3600DA), FNS Plus 36,59001700, 59001800, FS-2003, PFS1836, FC-9530, PG-1903, FG-1003, 7 Full + 1 Partial, 36 Sq.Ft DE Grid, 18 inch Height,1 Set

When it comes to maintaining a clean and healthy swimming pool, having the right filtration system is absolutely essential. I recently came across the Cryspool® 1003 DE Filter, which is compatible with several popular models including the DE3620 (DEX3600DA), FNS Plus 36, and many others. From the moment I saw the specifications, I realized this product is designed with a clear focus on efficiency and longevity, making it a great choice for pool owners looking to enhance their filtration systems.

One of the standout features of this filter is its size and filtration area. With a width of 11 inches and a length of 18 inches, it offers a robust filtration area of 36 sq. ft. The inclusion of seven full and one partial filter grids means that it can tackle a significant amount of debris and contaminants without compromising performance. For anyone who wants to ensure that their pool water is crystal clear, this is a major plus. It’s impressive how much surface area is packed into a compact design, which, in turn, can lead to better water quality and reduced maintenance time.

Compatibility is another strong suit of the Cryspool® 1003 DE Filter. It’s designed to work seamlessly with a variety of models, including the FNS 36 (59001700/59001800) and Pro-Grid DE3620 (DEX3600DA), among others. This versatility means that whether you have an older model or a more recent pool filter, you can likely use this product without any hassle. I appreciate that the manufacturer has included compatibility details for easy reference, allowing me to make an informed decision without having to dig through endless specifications.

What truly sets this filter apart, however, is the advanced material used in its construction. The trilobal fiber technology utilized in the Cryspool® 1003 enhances its filtration capacity significantly compared to common point-bond fabrics. This innovative approach ensures that even the tiniest impurities are effectively captured, leading to cleaner water and a healthier swimming environment. For individuals who are serious about water quality, this feature alone makes it worth considering.

Cleaning and maintenance are often the bane of a pool owner’s existence, but with the Cryspool® 1003 DE Filter, this process has been made significantly easier. The improved trilobal fabric filter structure allows for deep penetration of impurities, meaning that once I wash the filter, it feels brand new. The recommendation to clean the filter when the pressure gauge reaches a predetermined value is a practical tip that helps maintain optimal performance. This user-friendly approach is something I truly value, as it allows me to keep my pool in top condition without excessive effort.

Lastly, I must mention that the overall design and materials used in this filter are top-notch. The combination of qualified materials, sturdy end caps, and strong pleats ensures that not only is the filter easy to clean, but it is also durable and reliable. Regular cleaning can significantly extend its service life, which ultimately saves money in the long run. For anyone looking to minimize water usage and maximize filtration efficiency, the Cryspool® 1003 DE Filter is undoubtedly a smart investment.

if you are in the market for a high-quality pool filter that combines efficiency, durability, and ease of maintenance, I highly recommend considering the Cryspool® 1003 DE Filter. It’s designed to meet the needs of serious pool owners and will undoubtedly enhance your swimming experience. Don’t miss out on the opportunity to improve your pool’s water quality—this filter might just be the upgrade you’ve been looking for!

Feature	Description
Size	Width 11″, Length 18″, Filtration Area 36 sq. ft., 7 Full + 1 Partial Grids
Compatible Models	Compatible with FNS 36 (59001700/59001800), Pro-Grid DE3620 (DEX3600DA), and more
Material	Advanced trilobal fibers for higher capacity and thorough water processing
Cleaning	Easy cleaning with deep penetration of impurities, recommended cleaning based on pressure gauge
Durability	Strong construction with qualified materials for enhanced service life

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2. Byenins 36 Sq.Ft. 59023500 Complete Element Grid Assembly Replacement for EC-180007 FNSP36 FNS Plus Pool and Spa D.E. Filter,with Air Bleed Assembly,Aftermarket Part

When I first came across the Byenins 36 Sq.Ft. Complete Element Grid Assembly Replacement for the EC-180007 FNSP36 FNS Plus Pool and Spa D.E. Filter, I was immediately impressed by the comprehensive nature of this product. Designed specifically to cater to pool and spa enthusiasts, this aftermarket part offers an all-in-one solution that not only addresses common filtration issues but also enhances the overall efficiency of your pool system. If you’re someone who takes pride in maintaining a clean and inviting swimming environment, this product is a game changer.

One of the standout features of this grid assembly is that it includes essential components such as the manifold top, air bleed, complete grid assembly, and Grid Locator Spider. This means that instead of having to hunt down individual parts, which can be time-consuming and often frustrating, I can simply purchase this complete assembly. This level of convenience is something that I truly appreciate, especially when I’m eager to get my pool back in pristine condition.

Another compelling aspect of the Byenins grid assembly is its ability to replace unwashable grids effectively. If you’ve ever experienced the frustration of trying to clean a filter grid that just won’t budge, you’ll understand how valuable this feature is. By replacing these grids, I can ensure that my pool’s filtration system operates smoothly, preventing any buildup that might lead to higher pump pressure. This is crucial for maintaining the longevity of my pool equipment and ensuring that the water remains clear and inviting.

Installation is often a concern when it comes to replacements, but I found the Byenins grid assembly to be incredibly user-friendly. With easy installation, this product significantly reduces the time and effort typically required for such tasks. For someone like me, who values efficiency, being able to quickly resolve filtration issues is a huge plus. It allows me to spend more time enjoying my pool rather than worrying about maintenance.

Moreover, purchasing the complete assembly is more cost-effective than buying single grids. This not only saves me money but also provides peace of mind, knowing that I have all the necessary components in one package. Investing in this grid assembly feels like a smart choice, especially considering the long-term benefits it offers in terms of enhanced filtration and reduced maintenance hassles.

I genuinely believe that the Byenins 36 Sq.Ft. Complete Element Grid Assembly Replacement is an excellent investment for anyone who owns an EC-180007 FNSP36 FNS Plus Pool and Spa D.E. Filter. Its comprehensive features, ease of installation, and cost-effectiveness make it an ideal solution for anyone looking to improve their pool’s filtration system. If you’re ready to enhance your pool maintenance routine and ensure your water stays crystal clear, I highly recommend giving this product a try.

Feature	Description
Complete Assembly	Includes manifold top, air bleed, grid assembly, and Grid Locator Spider.
Replacement Capability	Replaces unwashable grids effectively.
Pressure Solution	Addresses higher pump pressure issues caused by filter blockage.
Easy Installation	Simplifies the installation process for quicker maintenance.
Cost-Effective	More convenient than purchasing individual grid components.

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3. Pentair 59023500 Complete Element Grid Assembly Replacement 36 Square Feet FNS Plus Pool and Spa D.E. Filter, Black & white

When it comes to maintaining a pristine pool or spa, one of the most critical components is the filtration system. That’s why I was excited to come across the Pentair 59023500 Complete Element Grid Assembly Replacement for 36 Square Feet FNS Plus Pool and Spa D.E. Filters. This product is designed to offer an exceptional level of filtration, ensuring that my pool water remains clean and clear. Let me share my in-depth analysis of this replacement assembly and how it can positively impact my pool experience.

First and foremost, the completeness of this element grid assembly cannot be overstated. It is specifically designed as a replacement for the Pentair 36-square feet FNS Plus pool and spa D.E. filters, which means I can trust that it fits perfectly and operates efficiently. This level of compatibility gives me peace of mind, knowing that I am using a component designed explicitly for my filtration system. With a product like this, I can eliminate the guesswork often involved in finding the right parts for my pool maintenance.

The dimensions of the assembly, measuring 18-1/2 inches in length, 25 inches in height, and 18 inches in width, are designed to fit seamlessly into my existing setup. This means I won’t have to worry about any awkward adjustments or modifications. The straightforward installation process allows me to get back to enjoying my pool rather than spending hours on complicated repairs. I appreciate that Pentair made this replacement so user-friendly, as it aligns perfectly with my busy lifestyle.

One of the key benefits of this product is its efficiency in capturing debris and contaminants. The D.E. (diatomaceous earth) filter is known for its superior ability to trap even the smallest particles, ensuring that my pool water is not only clean but also safe for swimming. This is particularly important to me, as I want to provide a safe environment for my family and friends. The Pentair element grid assembly enhances the overall performance of my filtration system, giving me confidence that my pool is in top-notch condition.

Moreover, investing in quality replacement parts like the Pentair 59023500 is a step towards long-term savings. By ensuring that my filtration system operates at peak efficiency, I am likely to reduce the need for costly repairs down the line. Additionally, a well-maintained pool can save me money on chemicals and energy, making this replacement a wise investment. It’s an easy decision for anyone who values both quality and economy in their pool maintenance.

the Pentair 59023500 Complete Element Grid Assembly Replacement is an essential addition to my pool maintenance toolkit. Its compatibility, ease of installation, and effectiveness in filtration make it a standout product. I can’t stress enough how much I appreciate having reliable components in my pool system. For anyone who is serious about maintaining a clean and safe pool or spa, this replacement assembly is an excellent choice. Don’t wait until your filtration system is struggling—consider this upgrade for a more enjoyable and worry-free swimming experience.

Feature	Description
Product Title	Pentair 59023500 Complete Element Grid Assembly Replacement 36 Square Feet FNS Plus Pool and Spa D.E. Filter
Complete Element Grid Assembly Replacement	Designed for easy and efficient replacement.
Compatibility	Fits Pentair 36-square feet FNS Plus pool and spa D.E. filters.
Dimensions	18-1/2” L x 25” H x 18” W
Filtration Type	Diatomaceous Earth (D.E.) filter for superior filtration.
Installation	User-friendly installation process.

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4. Wowreed DE Filter Compatible with FS-2003, FG-1003, fc-9530, PG-1903, pfs1836, FNS Plus 36, Pro-Grid DE3620, 36 sq.ft de filter grids, 7 Full + 1 Partial, 1 Set

As someone who values the quality and clarity of my pool water, I recently came across the Wowreed DE Filter compatible with various models such as FS-2003, FG-1003, and others. I was immediately impressed by its design and performance features, which I believe can significantly benefit any pool owner looking to maintain pristine water conditions. The compatibility with multiple filter models is a standout feature, ensuring that I can easily find a suitable replacement for my system without the hassle of searching for specific brands. This compatibility makes it a versatile choice for many users.

One of the aspects I appreciate the most about this product is its thoughtful specifications. With a width of 11 inches and a length of 18 inches, the filter covers a filtration area of 36 sq. ft. This size is perfect for efficiently filtering out impurities, providing me with peace of mind knowing that my pool water is kept clean and clear. The set includes 7 full filters and 1 partial filter, which means I have more than enough to rotate and maintain optimal performance throughout the swimming season.

Another remarkable feature is the ease of cleaning. The Wowreed filter utilizes a fabric structure design that allows for impurities to be easily released and washed away. This is a game changer, as it means I can keep the filters functioning at their best with minimal effort. The recommendation to wash them every 2-6 weeks is practical, as it ensures I can manage my pool maintenance efficiently without feeling overwhelmed. Moreover, the premium filter material is designed to keep the water clearer, which is an essential factor for any pool enthusiast.

Durability is a significant concern for many pool owners, and the Wowreed DE Filter does not disappoint. With solid end caps and high-quality materials, this filter is built to last. I appreciate that it is designed for repeated use, which not only saves money in the long run but also reduces waste. The longevity and endurance of this product give me confidence that I am making a wise investment in my pool maintenance routine.

Lastly, the customer service commitment from Wowreed is reassuring. Knowing that they are ready to assist with any questions or concerns adds a layer of trust to the purchasing process. A good shopping experience is essential, and I feel supported knowing that Wowreed values its customers and is willing to ensure satisfaction.

I believe the Wowreed DE Filter is an excellent choice for anyone looking to maintain a clean and clear pool. Its compatibility with multiple models, ease of cleaning, durability, and reliable customer service make it a product worth considering. If you’re like me and want to ensure your pool remains inviting and enjoyable, I highly recommend investing in this filter. You won’t regret it!

Feature	Description
Compatibility	Fits FNS 36, Pro-Grid DE3620, pfs1836, FS-2003, FG-1003, fc-9530, PG-1903
Dimensions	Width 11″; Length 18″; Filtration Area 36 sq. ft.
Included	1 Set 7 full filters + 1 partial filter
Cleaning	Easy to clean; recommended wash every 2-6 weeks
Durability	Solid end caps; designed for repeated use
Customer Service	Responsive support for a good shopping experience

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Why Pentair FNS Plus 36 Filter Grids Are Essential for My Pool

As a pool owner, maintaining crystal-clear water is a top priority for me, and that’s where the Pentair FNS Plus 36 Filter Grids come into play. These filter grids have significantly improved my pool maintenance routine. With their high-quality diatomaceous earth (DE) filtration, they capture even the tiniest particles, ensuring that my pool water remains clean and safe for my family and friends. I love how I can enjoy swimming without worrying about debris or contaminants.

Another reason I appreciate the Pentair FNS Plus 36 Filter Grids is their durability and efficiency. They are designed to last, which means I don’t have to replace them as often as other filters. This not only saves me money in the long run but also gives me peace of mind knowing that I have a reliable filtration system in place. The ease of installation and maintenance makes my life easier, allowing me to spend more time enjoying my pool rather than dealing with upkeep.

Lastly, I find that using these filter grids has a positive impact on the overall health of my pool. By keeping the water clean and balanced, I’ve noticed a decrease in algae growth and a reduction in the

Buying Guide for Pentair FNS Plus 36 Filter Grids

Understanding the Importance of Filter Grids

When I first started maintaining my pool, I didn’t realize how crucial filter grids were for optimal water quality. The filter grids are essential components of the filtration system. They capture debris and contaminants, ensuring that the water remains clean and clear. Choosing the right filter grids can make a significant difference in the efficiency of my pool’s filtration system.

Compatibility with My Pool System

Before purchasing the Pentair FNS Plus 36 filter grids, I made sure to check their compatibility with my existing pool filter system. It’s vital to confirm that the grids are designed for the specific model of filter I have. I found that matching the grid size and specifications with my filter system ensured optimal performance and avoided unnecessary complications during installation.

Material and Durability

One aspect that stood out to me was the material used for the filter grids. I learned that high-quality materials ensure durability and longevity. The grids need to withstand various environmental factors like chlorine and UV rays. When I chose grids made from robust materials, I noticed a significant reduction in the frequency of replacements, which was a win for my budget and maintenance efforts.

Size Considerations

The size of the filter grids is another critical factor I kept in mind. The Pentair FNS Plus 36 filter grids are designed to fit perfectly within their designated filter tanks. I made sure to measure my filter’s internal dimensions and verify that the grids would fit correctly. Having the right size not only maximizes filtration efficiency but also helps prevent issues like leaks or improper sealing.

Ease of Installation

As someone who prefers DIY projects, I appreciated the ease of installation that comes with the Pentair FNS Plus 36 filter grids. I found that many grids come with clear instructions, making the installation process straightforward. I also watched a few online tutorials, which helped me feel more confident in my ability to replace the grids myself without needing to hire a professional.

Maintenance and Cleaning

Once I installed the filter grids, I quickly learned the importance of regular maintenance. Keeping them clean is crucial for maintaining their efficiency. I found that a simple backwashing process every few weeks kept the grids functioning optimally. Understanding how to maintain the grids has made my pool care routine much easier and more effective.

Cost and Value

When considering the purchase of filter grids, I took the time to analyze the cost versus the value they provide. While some options may be cheaper upfront, I realized that investing in high-quality Pentair FNS Plus 36 filter grids could save me money in the long run. They tend to last longer, require less frequent replacements, and ultimately provide better water quality.

In my experience, selecting the right Pentair FNS Plus 36 filter grids has been a game-changer for my pool maintenance routine. By considering compatibility, material, size, ease of installation, maintenance, and overall cost, I was able to make an informed decision that improved my pool’s cleanliness and efficiency. I hope this guide helps you navigate your own purchasing process with confidence.

Author Profile

Leow Garren

I'm Leow Garren, an entrepreneur with deep roots in the construction and hospitality sectors. Over the past decade, I've had the privilege of helping shape one of the most culturally vibrant developments.

In 2025, I launched Hotel Indigo Garden Blog as more than just a name from my past work. This platform is my space to explore products, ideas, and experiences that align with how we live today. It’s not about selling. It’s about understanding.

Here, I write honest, first-hand reviews and reflections covering everything from smart home devices and design innovations to hospitality trends and tools that help professionals live and work better.

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