Aquarium Heater 20 Gallon
Aquarium Heater 20 Gallon shows a sweet-spot price point ($18.69 avg), but soft demand (-23.1% this quarter) keeps it on the watch list.
Flapen Score
Top 42% of 3,978 Pet Supplies niches · +1 vs the category median of 51
Is Aquarium Heater 20 Gallon profitable on Amazon?
According to Flapen's Amazon United States niche tracking, Aquarium Heater 20 Gallon is a $269K/yr Amazon United States market (207K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 52/100.
Aquarium Heater 20 Gallon: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Worth a look. Search demand moved -23.1% over the last 90 days and 7.0% of searches end in a purchase.
$269K
revenue / yr
Who owns the niche?
The top 5 brands hold 78% of demand, so 22% of the market is open.
22%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.
0/100
page quality · 27 products
Top Aquarium Heater 20 Gallon products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
Orlushy Submersible Aquarium Heater Adjustable Fish Tahk Heater with Free Thermometer Suitable for Marine Saltwater and Freshwater
- Price
- $20.37
- Rating
- 4.4/5
- Reviews
- 8,296
- Age
- 7y ago
Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat 100-Watt Multicolor 10-30 Gallon
- Price
- $17.62
- Rating
- 4.4/5
- Reviews
- 16,772
- Age
- 19y ago
Orlushy Submersible Aquarium Heater Adjustable Fish Tahk Heater with Free Thermometer Suitable for Marine Saltwater and Freshwater
- Price
- $15.77
- Rating
- 4.4/5
- Reviews
- 4,905
- Age
- 7y ago
HITOP 50W Adjustable Aquarium Heater Submersible Fish Tank Heater Thermostat with Suction Cups for 6-15Gal
- Price
- $13.16
- Rating
- 4.4/5
- Reviews
- 4,149
- Age
- 7y ago
hygger Small Aquarium Betta Heater Submersible Fish Tank Heater 10W/25W/50W/100W with LED Digital Display Suitable for Marine Saltwater and Freshwater up to 5/10/16/26 Gallon
- Price
- $16.73
- Rating
- 4.6/5
- Reviews
- 589
- Age
- 3y ago
Trending
90-day click momentum
PULACO 100Watt Aquarium Heater for 15-25 Gallon Fish Tank Adjustable Submersible Heater Thermostat with Thermometer Strip and Suction Cup
- Price
- $10.59
- Rating
- 4.3/5
- Reviews
- 28
- Age
- 1y ago
SEAOURA Small Aquarium Heater 100W Fish Tank Heater for 10-20 Gallon Submersible Turtle Heater with Digital Display Adjustable Safety Protection Auto Power-Off When Leaving Water
- Price
- $21.41
- Rating
- 4.4/5
- Reviews
- 65
- Age
- 4mo ago
HiTauing Aquarium Heater 25W/50W/100W/200W/300W Adjustable Knob Fish Tank Heater with Digital Thermometer Submersible Betta/Turtle Tank Heater for Freshwater and Saltwater Tanks
- Price
- $13.66
- Rating
- 4.6/5
- Reviews
- 89
- Age
- 9mo ago
VCRAZE Aquarium Heater 25W Submersible Fish Tank Heater with LED Digital Display Auto Power-Off When Leaving Water & High Temp Protection for Fresh and Salt Water Tanks 3-5 Gal
- Price
- $17.70
- Rating
- 4.6/5
- Reviews
- 74
- Age
- 9mo ago
hygger Ceramic Submersible Aquarium Heater New Explosion-Proof Fish Tank Water Heater with External Temp Controller Auto Thermostat Heater for Saltwater Freshwater (100W for 5~20 Gallon)
- Price
- $23.14
- Rating
- 4.9/5
- Reviews
- 34
- Age
- 5y ago
Newest
by launch dateSEAOURA Small Aquarium Heater 100W Fish Tank Heater for 10-20 Gallon Submersible Turtle Heater with Digital Display Adjustable Safety Protection Auto Power-Off When Leaving Water
- Price
- $21.41
- Rating
- 4.4/5
- Reviews
- 65
- Age
- 4mo ago
HiTauing Aquarium Heater 25W/50W/100W/200W/300W Adjustable Knob Fish Tank Heater with Digital Thermometer Submersible Betta/Turtle Tank Heater for Freshwater and Saltwater Tanks
- Price
- $9.86
- Rating
- 3.9/5
- Reviews
- 65
- Age
- 9mo ago
HiTauing Aquarium Heater 25W/50W/100W/200W/300W Adjustable Knob Fish Tank Heater with Digital Thermometer Submersible Betta/Turtle Tank Heater for Freshwater and Saltwater Tanks
- Price
- $13.66
- Rating
- 4.6/5
- Reviews
- 89
- Age
- 9mo ago
AquaMiracle Submersible Aquarium Heater 100W Fish Tank Heaters with LED Digital Temp Display Dry-Run Auto Power-Off & Overheat Protection for Freshwater and Saltwater Tanks (10-20 Gal)
- Price
- $23.10
- Rating
- 4.5/5
- Reviews
- 136
- Age
- 9mo ago
VCRAZE Aquarium Heater 25W Submersible Fish Tank Heater with LED Digital Display Auto Power-Off When Leaving Water & High Temp Protection for Fresh and Salt Water Tanks 3-5 Gal
- Price
- $17.70
- Rating
- 4.6/5
- Reviews
- 74
- Age
- 9mo ago
Competition: brands, sellers & click share
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.
Brands
13 rising
Sellers
30
Top-5 brand share
78%
Top 20: 100%
Top-5 click share
46%
Top 20: 93%
Open market
13%
- Orlushy30%
- hygger14%
- HiTauing12%
- HITOP12%
- AQUANEAT9%
- Tetra9%
- Open — no brand owns it (7 brands, 13%)
Aquarium Heater 20 Gallon demand & seasonality
Weekly search volume, with the niche's key stats alongside.
Peak months: Nov, Dec · busiest ÷ quietest = 2.0×
Top Aquarium Heater 20 Gallon search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- aquarium heater 20 gallon70K/yr
- fish tank heater 20 gallon38K/yr
- 20 gallon fish tank heater22K/yr
- 20 gallon aquarium heater15K/yr
- 100 watt aquarium heater14K/yr
- 100w aquarium heater14K/yr
- 20 gallon tank heater11K/yr
- aquarium heater 100w12K/yr
- tank heater 20 gallon7K/yr
- 20 gallon heater5K/yr
What reviews say buyers love and hate about Aquarium Heater 20 Gallon
What buyers mention most, as a share of all reviews.
What buyers love
86% of reviews“Heating excellent”
“well made”
“Fairly priced”
“As advertised”
“Ease of use”
What buyers complain about
84% of reviews“Stopped heating”
“Didnt last”
“Doesn't work properly”
“quality control is lacking”
“it barely fits”
Aquarium Heater 20 Gallon return rate & reasons
Why buyers send it back, as a share of all return requests.
3.0%
Return rate
39%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Aquarium Heater 20 Gallon questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
