Is aquarium thermometers profitable to sell on Amazon United Kingdom?

The niche generates £130K/yr across 13 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -16.8%. Flapen's verdict: Skip it (43/100).

How competitive is the aquarium thermometers niche?

11 brands and 24 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 83% of demand.

What do buyers complain about in aquarium thermometers?

Top complaints mined from reviews: Durability, Functionality-Overall, Size-Overall. The return rate is 0.3%.

When does demand for aquarium thermometers peak?

Demand peaks in Jan–Feb; the busiest month runs 1.5× the quietest.

What does it cost to enter the aquarium thermometers niche?

Listings span £2.79–£8.02; the average listing price is £4.54 (sweet spot $15–$100). The average incumbent carries 2,763 reviews — the moat a new listing must climb.

aquarium thermometers

Skip it

Prices mostly outside the sweet spot ($2.79–$8.02) — this niche doesn't clear our bar today.

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Conversion

Incredible13.3%

search→purchase rate — share of searches ending in a sale

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Brand share

Okay83%

top-5 brand share — brands hold most of the demand

Review moat

Okay2,763.15

avg incumbent reviews — the moat a new listing must climb

Market size

Okay£130K

£130K/yr · 215K searches

Competition

Bad78%

top-5 click share — a locked-up shelf

Growth

Bad-16.8%

90-day search growth — must beat 0% to launch

Avg price

Bad£4.54

avg listing price — sweet spot $15–$100

Price range

Bad£2.79–£8.02

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United Kingdom niche tracking, aquarium thermometers is a £130K/yr Amazon United Kingdom market (215K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jan–Feb. Verdict: Skip it — 43/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

aquarium thermometers market data

Units sold / yr: 20K–25K; avg 1,250–1,500/product
Revenue / yr: £91K–£114K; units × avg price
Conversion rate: 13.3%
Avg BSR: #14
Page quality: 0%
Prime: 85%
Sponsored: 62%
Out of stock: 3.4%
Avg brand age: 36 months
Avg seller age: 195 days

Competition & brand share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

Top-5 brand share

83%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

12%

QZQ37%
EETU16%
HOSCARER12%
Thermometer World10%
Zacro8%
MDLSDE5%
Open — no brand owns it (5 brands, 12%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -16.8% search growth over the last 90 days.

Peak months: Jan, Feb · busiest ÷ quietest = 1.5×

Open Trend

Top aquarium thermometers search terms

aquarium thermometer81K/yr -14.7%7.8% conv.
fish tank thermometer72K/yr -16.3%10.1% conv.
fish tank thermometer tropical18K/yr -35.7%10.0% conv.
aquarium thermometer digital11K/yr -14.8%6.0% conv.
fish tank temperature gauge8K/yr -10.0%8.9% conv.
digital aquarium thermometer6K/yr -14.1%7.0% conv.
thermometer for fish tank5K/yr +5.4%8.9% conv.
digital fish tank thermometer5K/yr -0.7%5.8% conv.
aquarium temperature gauge5K/yr -17.9%7.1% conv.
fish tank thermometer stick on3K/yr -36.0%11.4% conv.

All search terms

Top aquarium thermometers 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

QZQ Fish Tank Thermometer Aquarium Thermometer Digital Wireless Touch Stick LED Display 1C for Monitoring The Fish Tank Aquarium Temperature Accessories

QZQ£5.254.4★975 rev

Glass Aquarium Thermometer with Safe Zone Section and Suction Cup for Tropical Freshwater and Marine Saltwater Aquariums

EETU£3.534.1★623 rev

HOSCARER Fish Tank Thermometer Aquarium Thermometer Digital LED Wireless Precise Display 1/2F Energy-saving Adhesive Fish Tank Accessories

HOSCARER£4.874.4★57 rev

Twin Pack Fish Tank Thermometer Strips - LCD Temperature Gauge Stick on Aquarium Thermometer Strip for Temperature Control

Thermometer World£2.794.4★660 rev

Aquarium Thermometer - Digital Thermometer with Probe and Suction Cup Reptile Fish Tank Thermometer with Large LCD Display Terrarium Water Temperature Test

Zacro£5.784.5★14,274 rev

Newest

by launch date

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£8.02975 rev

4mo ago

Fish Tank Thermometer Digital Aquarium Thermometer Energy-saving Adhesive Fish Tank Accessories LED Precise Display 1C for Tropical Aquarium/Turtle Reptile Terrarium

LYZHZHIUONGEI£4.0211 rev

8mo ago

HOSCARER Fish Tank Thermometer Aquarium Thermometer Digital LED Wireless Precise Display 1/2F Energy-saving Adhesive Fish Tank Accessories

HOSCARER£4.8757 rev

10mo ago

QZQ Fish Tank Thermometer LED Touch Screen Aquarium Thermometer Digital Wireless Precise Display 1/2F Energy-saving Adhesive Fish Tank Accessories

QZQ£5.6042 rev

11mo ago

Aquarium Thermometer Digital LCD Thermometer Fish Tank Probe

MDLSDE£5.0727 rev

11mo ago

What buyers say about aquarium thermometers

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall19%

“Very high quality very accurate”

Advertised Vs Actual Product14%

“Does the job perfectly”

Ease Of Use13%

“Easy to use”

Value For Money12%

“Very good value for money”

Efficiency9%

“Works perfectly”

Design-Overall8%

“What I really appreciate is the design”

Adhesion/Stickiness6%

“no problems sticking or staying stuck”

Display-Overall4%

“The LED display is bright”

Functionality-Overall2%

“Product operates as expected”

Size-Overall2%

“Nice size”

What buyers complain about

Durability12%

“Broke after a couple of months”

Functionality-Overall11%

“Dont work”

Size-Overall10%

“Not Fit For Purpose”

Quality-Overall8%

“Junk”

Display-Overall6%

“However the display isn't always lit up”

Color5%

“I cant see any colour”

Ease Of Use5%

“hard to read”

Adhesion/Stickiness5%

“Awful adhesive, doesnt read the temperate and completely useless”

Battery Life4%

“not sure how easy they will be to remove though after battery dies”

Value For Money3%

“Not worth the money”

Top return reasons

Functionality-Overall32%

Adhesion/Stickiness20%

Defective Material/Parts12%

Heating8%

Compatibility-Overall6%

Display-Overall6%

Color4%

Durability3%

Quality-Overall3%

Advertised Vs Actual Product3%

Common questions

Is aquarium thermometers profitable to sell on Amazon United Kingdom?: The niche generates £130K/yr across 13 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -16.8%. Flapen's verdict: Skip it (43/100).
How competitive is the aquarium thermometers niche?: 11 brands and 24 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 83% of demand.
What do buyers complain about in aquarium thermometers?: Top complaints mined from reviews: Durability, Functionality-Overall, Size-Overall. The return rate is 0.3%.
When does demand for aquarium thermometers peak?: Demand peaks in Jan–Feb; the busiest month runs 1.5× the quietest.
What does it cost to enter the aquarium thermometers niche?: Listings span £2.79–£8.02; the average listing price is £4.54 (sweet spot $15–$100). The average incumbent carries 2,763 reviews — the moat a new listing must climb.