---
title: "Aquarium Thermometer — $650K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/aquarium-thermometer"
last_updated: "2026-07-22T21:31:56.251Z"
locale: en
meta:
description: "Niche score 48/100 · $650K/yr market · 785K searches/yr · $8.04 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $650K/yr market · 785K searches/yr · $8.04 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Aquarium Thermometer — $650K/yr Amazon US Niche (2026) - Flapen"
---
# **aquarium thermometer**
**Skip it**
Soft demand (-16.0% this quarter) — this niche doesn't clear our bar today.
Market size 66Growth 17Conversion 88Competition 24Returns 93Price range 20Avg price 22Brand share 36Review moat 39Quality gap 57
**Returns**
**Great****1.1%**
return rate — above 6% kills the launch gate
**Conversion**
**Great****10.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$650K**
$650K/yr · 785K searches
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****2,641.07**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Avg price**
**Bad****$8.04**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****$3.80–$17.83**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-16.0%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, aquarium thermometer is a $650K/yr Amazon United States market (785K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Aug. Verdict: Skip it — 48/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **aquarium thermometer market data**
- **Units sold / yr**
- **60K–80K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$482K–$643K**
- units × avg price
- **Launch success**
- **—**
- 2 of 3 new (360d)
- **Conversion rate**
- **10.3%**
- **Avg BSR**
- **#12**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **177 days**
## **Competition & brand share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**12 **▼falling
**Sellers**
**26**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**13%**
- PAIZOO32% - QZQ21% - AQUANEAT18% - Penn-Plax8% - WEIMELTOY4% - Zacro3% - Open — no brand owns it (6 brands, 13%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -16.0% search growth over the last 90 days.
45K35KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Aug · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/aquarium-thermometer/trend)
## **Top aquarium thermometer search terms**
- **aquarium thermometer**259K/yr-18.2%8.3% conv. - **fish tank thermometer**142K/yr-19.2%9.6% conv. - **aquarium thermometer digital**46K/yr-18.3%10.2% conv. - **thermometer for fish tank**23K/yr-6.3%7.4% conv. - **tank thermometer**15K/yr+36.7%7.8% conv. - **digital aquarium thermometer**22K/yr-12.7%7.4% conv. - **fish tank thermometer stick on**19K/yr-18.5%10.8% conv. - **aquarium temperature gauge**17K/yr-11.8%8.7% conv. - **aquarium thermometers**146K/yr+0.3%2.4% conv. - **aquarium thermometer strip**14K/yr-22.9%6.3% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/aquarium-thermometer/search-terms)
## **Top aquarium thermometer 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%$65K20%$130K30%$195K40%$260K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**PAIZOO Fish Tank Digital Thermometer Accurate LED Display to 0.9F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish Axolotl Turtle or Aquatic**PAIZOO**$9.62**4.5★6,018 rev](https://www.amazon.com/dp/B0BFVST4XX) [2**QZQ Fish Tank Thermometer Aquarium Thermometer Wireless Touch Stick Digital Aquarium Thermometer LED Display 1F for Monitoring The Fish Tank Aquarium Temperature Accessories (Black)**QZQ**$6.41**4.6★1,858 rev](https://www.amazon.com/dp/B0CT31ZPXV) [3**AQUANEAT Aquarium Thermometer Fish Tank Thermometer Digital Temperature Test with Large LCD Display (1 Pack)**AQUANEAT**$4.36**4.3★6,920 rev](https://www.amazon.com/dp/B01N1QQ4EH) [4**Penn-Plax Therma-Temp Floating Aquarium Thermometer - Easy to Read - Temperature Gauge with Optional Suction Cup & Removable Mount - Safe for Freshwater & Saltwater Tanks - Multicolor 4.25 Inches**Penn-Plax**$7.71**4.3★1,615 rev](https://www.amazon.com/dp/B0002568UE) [5**AQUANEAT 2 Pack Aquarium Thermometer Fish Tank Thermometer Digital Temperature Test with Large LCD Display**AQUANEAT**$8.05**4.4★1,317 rev](https://www.amazon.com/dp/B09JNGZFMP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Novique Digital Aquarium Thermometer Fish Tank Thermometer Test with Large LCD Display Fahrenheit/Celsius(/) for Aquarium Reptile Terrarium Turtle Tank**Novique**$5.06**57 rev8mo ago](https://www.amazon.com/dp/B0G1LZDDXW) [**Carefree Fish Aquarium Digital Thermometer Cordless Replaceable Battery LED Display Temperature Measurement Error 0.9(US Patent Number:D1038779S)**Carefree Fish**$7.70**146 rev11mo ago](https://www.amazon.com/dp/B0F63GVKRD) [**QZQ Fish Tank Thermometer Aquarium Thermometer Wireless Touch Stick Digital Aquarium Thermometer LED Display 1F for Monitoring The Fish Tank Aquarium Temperature Accessories (2 Pack Black)**QZQ**$9.93**1,858 rev11mo ago](https://www.amazon.com/dp/B0FMPB2KYG) [**DaToo Aquarium Thermometer with Large LCD Display Fahrenheit/Celsius(/) Fish Tank Thermometer for Aquarium Reptile Terrarium Digital Water Thermometer with Suction Cup**DaToo**$3.80**359 rev1y ago](https://www.amazon.com/dp/B0DXF1Y3R6) [**Aquarium Thermometer Digital Fish Tank Thermometer Led Display Fish Tank Temperature Gauge Accurate Thermometer to 1 for Betta Axolotl Turtle Tank (with Spare Battery)**WEIMELTOY**$6.35**595 rev1y ago](https://www.amazon.com/dp/B0DX67FQNH)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Novique Digital Aquarium Thermometer Fish Tank Thermometer Test with Large LCD Display Fahrenheit/Celsius(/) for Aquarium Reptile Terrarium Turtle Tank**Novique**$5.06**4.4★**▲ 192%**](https://www.amazon.com/dp/B0G1LZDDXW) [**QZQ Fish Tank Thermometer Aquarium Thermometer Wireless Touch Stick Digital Aquarium Thermometer LED Display 1F for Monitoring The Fish Tank Aquarium Temperature Accessories (2 Pack Black)**QZQ**$9.93**4.6★**▲ 66%**](https://www.amazon.com/dp/B0FMPB2KYG) [**Carefree Fish Aquarium Digital Thermometer Cordless Replaceable Battery LED Display Temperature Measurement Error 0.9(US Patent Number:D1038779S)**Carefree Fish**$7.70**4.5★**▲ 16%**](https://www.amazon.com/dp/B0F63GVKRD) [**Petbank LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature**Zacro**$9.10**4.5★**▲ 15%**](https://www.amazon.com/dp/B01A0TMS6Y) [**Penn-Plax Therma-Temp Floating Aquarium Thermometer - Easy to Read - Temperature Gauge with Optional Suction Cup & Removable Mount - Safe for Freshwater & Saltwater Tanks - Multicolor 4.25 Inches**Penn-Plax**$7.71**4.3★**▲ 13%**](https://www.amazon.com/dp/B0002568UE)
**~~View all trending →~~**
## **What buyers say about aquarium thermometer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**22%
*“Easy to read”*
**Quality-Overall**15%
*“Good quality and accurate”*
**Value For Money**14%
*“fair price”*
**Advertised Vs Actual Product**10%
*“Just as described”*
**Efficiency**5%
*“Does the job”*
**Size-Overall**4%
*“Great size”*
**Adhesion/Stickiness**3%
*“I have had no issues with the stickiness”*
**Design-Overall**3%
*“It's accurate and looks aesthetically pleasing”*
**Durability**3%
*“durable”*
**Ease Of Cleaning**3%
*“Easy, clean”*
### **What buyers complain about **
**Functionality-Overall**16%
*“not at all functional”*
**Durability**11%
*“Broke”*
**Battery Life**9%
*“Short battery life”*
**Adhesion/Stickiness**9%
*“Missing Adhesive”*
**Quality-Overall**8%
*“Poor quality”*
**Value For Money**6%
*“Not worth the 10$”*
**Ease Of Use**5%
*“found it impossible to do so”*
**Size-Overall**4%
*“Small and easy to place”*
**Water Resistance**3%
*“Got water in it the first day and ruined”*
**Heating**3%
*“it was 4 degrees off”*
### **Top return reasons **
**Functionality-Overall**27%
**Heating**16%
**Display-Overall**15%
**Advertised Vs Actual Product**7%
**Defective Material/Parts**7%
**Adhesion/Stickiness**7%
**Size-Overall**5%
**Value For Money**5%
**Battery Life**2%
**Product Condition**1%
## **Common questions**
- **Is aquarium thermometer profitable to sell on Amazon United States?**
- The niche generates $650K/yr across 15 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -16.0%. Flapen's verdict: Skip it (48/100).
- **How competitive is the aquarium thermometer niche?**
- 12 brands and 26 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in aquarium thermometer?**
- Top complaints mined from reviews: Functionality-Overall, Durability, Battery Life. The return rate is 1.1%.
- **When does demand for aquarium thermometer peak?**
- Demand peaks in Aug; the busiest month runs 2.2× the quietest.
- **What does it cost to enter the aquarium thermometer niche?**
- Listings span $3.80–$17.83; the average listing price is $8.04 (sweet spot $15–$100). The average incumbent carries 2,641 reviews — the moat a new listing must climb.
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