---
title: "Dolphin Pool Cleaner Filters — $42K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/dolphin-pool-cleaner-filters"
last_updated: "2026-08-10T17:58:17.541Z"
locale: en
meta:
description: "Niche score 57/100 · $42K/yr market · 18K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $42K/yr market · 18K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Dolphin Pool Cleaner Filters — $42K/yr Amazon US Niche (2026) - Flapen"
---
# **dolphin pool cleaner filters**
**Worth a look**
Shows demand growing +218.0% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 10Growth 98Conversion 76Competition 35Returns 64Price range 95Avg price 95Brand share 58Review moat 79Quality gap 24
**Growth**
**Incredible****+218.0%**
90-day search growth — must beat 0% to launch
**Avg price**
**Incredible****$32.84**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$18.07–$99.74**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****412.84**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Great****7.2%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Good****2.5%**
return rate — above 5% kills the launch gate
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****64%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$42K**
$42K/yr · 18K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, dolphin pool cleaner filters is a $42K/yr Amazon United States market (18K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 57/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **dolphin pool cleaner filters market data**
- **Units sold / yr**
- **1K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$41K–$49K**
- units × avg price
- **Conversion rate**
- **7.2%**
- **Avg BSR**
- **#347**
- **Page quality**
- **0%**
- **Prime**
- **89%**
- **Sponsored**
- **84%**
- **Out of stock**
- **2.7%**
- **Avg brand age**
- **32 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**23**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**64%**
Top 20: 100%
**Open market**
**24%**
- SUNRRA27% - Fil-fresh17% - Future Way10% - ULTICOR8% - Dolphin8% - TUOWS6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +218.0% search growth over the last 90 days.
800600Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 10.1×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/dolphin-pool-cleaner-filters/trend)
## **Top dolphin pool cleaner filters search terms**
- **dolphin pool cleaner filters**7K/yr+276.2%7.4% conv. - **dolphin nautilus cc plus filters**5K/yr+149.0%11.3% conv. - **dolphin ultra fine filter**4K/yr+159.5%4.9% conv. - **dolphin nautilus cc ultra fine filter**2K/yr+429.8%6.6% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/dolphin-pool-cleaner-filters/search-terms)
## **Top dolphin pool cleaner filters products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$4K20%$8K30%$12K40%$17K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**SUNRRA**$21.97**4.7★451 rev](https://www.amazon.com/dp/B09PLMSQKW) [2**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**Fil-fresh**$23.12**4.7★550 rev](https://www.amazon.com/dp/B07X6D7RKT) [3**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**Future Way**$21.95**4.7★596 rev](https://www.amazon.com/dp/B07X3TQ99N) [4**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**ULTICOR**$37.55**4.5★735 rev](https://www.amazon.com/dp/B0BKFZZ97D) [5**TUOWS for Dolphin Filters 9991432-R4 4 Packs Replacement Pool Filter Compatible with Dolphin M400/M500 Nautilus CC Plus Robotic Pool Cleaner**TUOWS**$18.54**4.9★25 rev](https://www.amazon.com/dp/B0FLTYW2HY)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**TUOWS for Dolphin Filters 9991432-R4 4 Packs Replacement Pool Filter Compatible with Dolphin M400/M500 Nautilus CC Plus Robotic Pool Cleaner**TUOWS**$18.54**25 rev11mo ago](https://www.amazon.com/dp/B0FLTYW2HY) [**LBLVBNEWD Ultra Fine Filter Panels Replacement Spring Filter Cartridges Compatible with Dolphin Nautilus CC Plus M500 M400 M200 Robotic Pool Cleaners Part # 9991432-R4 9991433-R4 8 Packs**LBLVBNEWD**$27.04**17 rev1y ago](https://www.amazon.com/dp/B0FGX52K2W) [**Ultra-Fine Filter Basket Compatible with Dolphin Pool Cleaner-Dolphin E10 Dolphin Nautilus CC Proteus DX3 Explorer E20 S50 S100 Active 10 & 15 Echo T15 T25 Saturn Cayman Escape Part# 9991460-R1**SUNRRA**$39.89**18 rev1y ago](https://www.amazon.com/dp/B0F8ZM1HQ2) [**Ultra-Fine Filter Basket Part No. 9991460-R1 for Dolphin Robotic Pool Cleaners | Compatible with S50 S100 Active 10/15 DX3 E10/E20 | Fits Nautilus Explorer Series | 50 Micron Mesh for Fine Debris**Doule King**$32.88**33 rev1y ago](https://www.amazon.com/dp/B0F8N4RPJC) [**Replace Part#9991467-R4 Ultra-Fine Filter Panels Compatible with Dolphin Robotic Pool Cleaners Pleated Cartridge Filter Replacement for Dolphin S200 Proteus DX4 Active 20 Active 30 S300i M600**Henkgo**$23.35**109 rev2y ago](https://www.amazon.com/dp/B0D3Q584M6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**TUOWS for Dolphin Filters 9991432-R4 4 Packs Replacement Pool Filter Compatible with Dolphin M400/M500 Nautilus CC Plus Robotic Pool Cleaner**TUOWS**$18.54**4.9★**▲ 43%**](https://www.amazon.com/dp/B0FLTYW2HY) [**Replace Part#9991467-R4 Ultra-Fine Filter Panels Compatible with Dolphin Robotic Pool Cleaners Pleated Cartridge Filter Replacement for Dolphin S200 Proteus DX4 Active 20 Active 30 S300i M600**Henkgo**$23.35**4.6★**▲ 27%**](https://www.amazon.com/dp/B0D3Q584M6) [**Funmit Ultra Fine Cartridge Filter Replacement for Dolphin Nautilus CC Plus M200 / M400 / M500 Robotic Pool Cleaner Parts Replaces Part # 9991432-R4 4 Pack**Funmit**$25.18**4.7★**▲ 17%**](https://www.amazon.com/dp/B09XK8VN9F) [**PUREBURG Ultra-Fine Filter Panels Compatible with Dolphin M200 M400 M500 and Nautilus CC Plus Robotic Pool Cleaner Replaces Part 9991432-R4 Pack of 8**PUREBURG**$26.19**4.8★**▲ 17%**](https://www.amazon.com/dp/B0C6LSX2G6) [**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**ULTICOR**$37.55**4.5★**▲ 17%**](https://www.amazon.com/dp/B0BKFZZ97D)
**~~View all trending →~~**
## **What buyers say about dolphin pool cleaner filters**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**27%
*“Fit and worked as expected”*
**Filtration**26%
*“Good filter”*
**Quality-Overall**12%
*“Initially, the basket looked like high quality”*
**Value For Money**9%
*“Great value”*
**Ease Of Cleaning**8%
*“Very easy to clean”*
**Advertised Vs Actual Product**7%
*“Works as advertised”*
**Durability**1%
*“Works perfect for the last 6 months”*
**Assembly/Installation**1%
*“easy to install”*
**Ease Of Use**1%
*“So much easier to use”*
**Sun Shade/Wind Shield**0%
*“storing out of the sun extends the life”*
### **What buyers complain about **
**Size-Overall**17%
*“This doesn't work to catch debris does not fit right Nautilus cc waste of time and money”*
**Filtration**16%
*“As others have mentioned the 1st filter is warped”*
**Durability**11%
*“broke when removing the basket”*
**Quality-Overall**8%
*“Not good quality it fell apart with in the 4 weeks”*
**Ease Of Cleaning**6%
*“I didnt realize how poorly it was cleaning before I replace the filters”*
**Defective Material/Parts**4%
*“All contents dump all over/in your unit”*
**Value For Money**2%
*“The replacement from the manufacturer was too expensive so I opted for this basket as it was reasonably priced”*
**Functionality-Overall**2%
*“To get them in we had to do the SIDES FIRST otherwise it wouldnt work”*
**Material Quality**1%
*“Really cheap material”*
### **Top return reasons **
**Size-Overall**62%
**Filtration**19%
**Advertised Vs Actual Product**9%
**Defective Material/Parts**2%
**Functionality-Overall**1%
**Durability**1%
**Value For Money**1%
**Compatibility-Overall**1%
**Material Quality**1%
**Ease Of Cleaning**1%
## **Common questions**
- **Is dolphin pool cleaner filters profitable to sell on Amazon United States?**
- The niche generates $42K/yr across 19 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +218.0%. Flapen's verdict: Worth a look (57/100).
- **How competitive is the dolphin pool cleaner filters niche?**
- 16 brands and 23 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in dolphin pool cleaner filters?**
- Top complaints mined from reviews: Size-Overall, Filtration, Durability. The return rate is 2.5%.
- **When does demand for dolphin pool cleaner filters peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 10.1× the quietest.
- **What does it cost to enter the dolphin pool cleaner filters niche?**
- Listings span $18.07–$99.74; the average listing price is $32.84 (sweet spot $15–$100). The average incumbent carries 413 reviews — the moat a new listing must climb.
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