---
title: "Pool Thermometer Sinking — $9K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/pool-thermometer-sinking"
last_updated: "2026-08-10T17:54:37.633Z"
locale: en
meta:
description: "Niche score 53/100 · $9K/yr market · 9K searches/yr · $11.67 avg price. A small market ($9K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $9K/yr market · 9K searches/yr · $11.67 avg price. A small market ($9K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Pool Thermometer Sinking — $9K/yr Amazon US Niche (2026) - Flapen"
---
# **pool thermometer sinking**
**Worth a look**
Shows demand growing +568.5% this quarter, but a small market ($9K/yr) keeps it on the watch list.
Market size 2Growth 100Conversion 81Competition 13Returns 100Price range 25Avg price 47Brand share 21Review moat 51Quality gap 96
**Growth**
**Incredible****+568.5%**
90-day search growth — must beat 0% to launch
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Great****8.4%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****1,472.7**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****$11.67**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****$8.01–$17.31**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****84%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$9K**
$9K/yr · 9K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0")
According to Flapen's Amazon United States niche tracking, pool thermometer sinking is a $9K/yr Amazon United States market (9K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 53/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **pool thermometer sinking market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$9K–$12K**
- units × avg price
- **Conversion rate**
- **8.4%**
- **Avg BSR**
- **#100**
- **Page quality**
- **0%**
- **Prime**
- **60%**
- **Sponsored**
- **80%**
- **Out of stock**
- **7.2%**
- **Avg brand age**
- **53 months**
- **Avg seller age**
- **186 days**
## **Competition & brand share**
The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**41**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**84%**
Top 20: 100%
**Open market**
**3%**
- XY-WQ32% - U.S. Pool Supply20% - Pentair17% - SplashTech15% - Poolmaster7% - HDBHSBE5% - Open — no brand owns it (2 brands, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +568.5% search growth over the last 90 days.
1K600Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 37.0×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/pool-thermometer-sinking/trend)
## **Top pool thermometer sinking 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%$91520%$2K30%$3K40%$4K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**XY-WQ 10 Large Shark Pool Thermometer Jumbo Easy-Read Pool Water Thermometer with Fully Sinking Design for Accurate Readings Tether Included for Swimming Pool Spa Hot Tub & Pond**XY-WQ**$9.79**3.9★611 rev](https://www.amazon.com/dp/B0FK4QX98R) [2**U.S. Pool Supply Scoop Pool Thermometer with Jumbo Easy to Read Temperature Display**U.S. Pool Supply**$8.94**4.1★2,340 rev](https://www.amazon.com/dp/B072N3L8ZM) [3**SplashTech Pocket Reservoir Pool Thermometer - Shatter Proof Dual Fahrenheit & Celsius Display 9.5 Cord - Swimming Pool Spa Hot Tub Pond Jacuzzi Maintenance Equipment**SplashTech**$11.24**4.2★2,622 rev](https://www.amazon.com/dp/B01BX6SYPW) [4**Pentair R141036 127 Tube Thermometer with ABS Case and 3-Feet Cord**Pentair**$14.72**4.3★2,545 rev](https://www.amazon.com/dp/B000PSDWIE) [5**Poolmaster 25285 Residential Thermometer - Classic Collection Medium**Poolmaster**$12.24**3.4★82 rev](https://www.amazon.com/dp/B000P41PDW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pool Thermometer Sinking Type 0-50 Easy Read Accurate Pool Thermometer with String for Outdoor Indoor Spas Aquarium Ponds Sinking with String**HDBHSBE**$8.01**2 rev3mo ago](https://www.amazon.com/dp/B0GTQZ68PX) [**Pool Thermometer Floating Water Temperature Thermometer with String Large Size Easy Read & Shatter Resistant Pool Accessories for Outdoor & Indoor Swimming Pools Spas Hot Tubs & Aquariums.(White)**Inpool**$9.23**747 rev8mo ago](https://www.amazon.com/dp/B0G2LJTLZJ) [**XY-WQ 10 Large Shark Pool Thermometer Jumbo Easy-Read Pool Water Thermometer with Fully Sinking Design for Accurate Readings Tether Included for Swimming Pool Spa Hot Tub & Pond**XY-WQ**$9.79**611 rev11mo ago](https://www.amazon.com/dp/B0FK4QX98R) [**U.S. Pool Supply Scoop Pool Thermometer with Jumbo Easy to Read Temperature Display**U.S. Pool Supply**$8.94**2,340 rev9y ago](https://www.amazon.com/dp/B072N3L8ZM) [![[Large Floating Pool Thermometer] eLander Pro Water Thermometers for Outdoor & Indoor Swimming Pools Spas Hot Tubs Fish Ponds](https://m.media-amazon.com/images/I/31bBpr9p8wL.jpg)**\[Large Floating Pool Thermometer\] eLander Pro Water Thermometers for Outdoor & Indoor Swimming Pools Spas Hot Tubs Fish Ponds**eLander**$9.16**5,427 rev10y ago](https://www.amazon.com/dp/B01GHM6XEQ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pool Thermometer Sinking Type 0-50 Easy Read Accurate Pool Thermometer with String for Outdoor Indoor Spas Aquarium Ponds Sinking with String**HDBHSBE**$8.01**3.0★**▲ 25%**](https://www.amazon.com/dp/B0GTQZ68PX) [**SplashTech Pocket Reservoir Pool Thermometer - Shatter Proof Dual Fahrenheit & Celsius Display 9.5 Cord - Swimming Pool Spa Hot Tub Pond Jacuzzi Maintenance Equipment**SplashTech**$11.24**4.2★**▲ 24%**](https://www.amazon.com/dp/B01BX6SYPW) [**XY-WQ 10 Large Shark Pool Thermometer Jumbo Easy-Read Pool Water Thermometer with Fully Sinking Design for Accurate Readings Tether Included for Swimming Pool Spa Hot Tub & Pond**XY-WQ**$9.79**3.9★**— 7%**](https://www.amazon.com/dp/B0FK4QX98R) [**U.S. Pool Supply Scoop Pool Thermometer with Jumbo Easy to Read Temperature Display**U.S. Pool Supply**$8.94**4.1★**— 6%**](https://www.amazon.com/dp/B072N3L8ZM) [**Pool Thermometer Floating Water Temperature Thermometer with String Large Size Easy Read & Shatter Resistant Pool Accessories for Outdoor & Indoor Swimming Pools Spas Hot Tubs & Aquariums.(White)**Inpool**$9.23**4.3★**— 9%**](https://www.amazon.com/dp/B0G2LJTLZJ)
**~~View all trending →~~**
## **What buyers say about pool thermometer sinking**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**21%
*“very convenient to use”*
**Advertised Vs Actual Product**19%
*“Just what we needed”*
**Value For Money**11%
*“Good price”*
**Measurement/Reading Accuracy**10%
*“Very accurate”*
**Quality-Overall**9%
*“Very well-made product”*
**Size-Overall**5%
*“Perfect size”*
**Design-Overall**3%
*“sleek design”*
**Durability**3%
*“Great quality and durable”*
**Strength**2%
*“It feels sturdy and well made, and it adds a fun touch to the pool area while still being very functional”*
**Weight Light**1%
*“Its light and floats nicely”*
### **What buyers complain about **
**Measurement/Reading Accuracy**16%
*“Inaccurate Readings”*
**Size-Overall**15%
*“The string is short”*
**Quality-Overall**14%
*“Cheap junk”*
**Functionality-Overall**9%
*“Never worked correctly unfortunately”*
**Ease Of Use**9%
*“Hard to read”*
**Durability**7%
*“Broke almost immediately after using it”*
**Water Resistance**5%
*“Was not waterproof”*
**Material Quality**2%
*“Arrived broken - made of cheap materials”*
**Advertised Vs Actual Product**2%
*“Pictures and advertising are deceiving”*
**Defective Material/Parts**1%
*“This item is defective”*
### **Top return reasons **
**Measurement/Reading Accuracy**39%
**Functionality-Overall**16%
**Heating**10%
**Defective Material/Parts**7%
**Advertised Vs Actual Product**7%
**Size-Overall**6%
**Value For Money**3%
**Leak-Proof**2%
**Ease Of Use**2%
**Quality-Overall**1%
## **Common questions**
- **Is pool thermometer sinking profitable to sell on Amazon United States?**
- The niche generates $9K/yr across 10 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +568.5%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the pool thermometer sinking niche?**
- 8 brands and 41 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in pool thermometer sinking?**
- Top complaints mined from reviews: Measurement/Reading Accuracy, Size-Overall, Quality-Overall. The return rate is 0.1%.
- **When does demand for pool thermometer sinking peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 37.0× the quietest.
- **What does it cost to enter the pool thermometer sinking niche?**
- Listings span $8.01–$17.31; the average listing price is $11.67 (sweet spot $15–$100). The average incumbent carries 1,473 reviews — the moat a new listing must climb.
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