5 Gallon Fish Tank Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
5 Gallon Fish Tank sales on Amazon US totaled 22,700 units in July 2026 (▲ 7.3% vs. the prior month), generating an estimated $624,843 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 79.7% of unit volume and 53.3% of revenue, while a typical listing is priced at $64.35. The keyword itself pulled 29,062 Amazon queries over the same period (▲ 13.1% MoM).
Zooming out to the 12-month window ending July 2026, the 5 gallon fish tank Top 50 moved 252,700 units and $7,000,916 in cumulative sales — an average of 21,058 units and $583,410 per month. Monthly throughput topped out at 23,800 units in April 2026 and dipped to 15,500 in May 2026, leaving the latest reading 9.4% higher than August 2025.
5 Gallon Fish Tank Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
22.7K
▲ 7.3% MoM
Monthly Revenue 2026/07
$624.8K
▲ 6.5% MoM
Top 10 Market Share 2026/07
79.7%
5 Gallon Fish Tank Market Share & Sales Concentration on Amazon US — July 2026
The most-sold 5 gallon fish tank listing on Amazon US in July 2026 is ASIN B091D3DTWS (Brand: Tetra), which sold 8,000 units at $10.29 apiece — equal to 35.2% of every unit tracked in this report and 2.7× the volume of the No. 2 listing.
The Top 10 ASINs account for 18,100 units and $333,234 in July 2026 — 79.7% of unit volume and 53.3% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for '5 Gallon Fish Tank' on Amazon
July 2026
Is 79.7% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B091D3DTWS
Tetra Water Cleaner Gravel Siphon for Aquariums Up to 55 Gal | Makes Water Changes Easier, Removes Debris From Gravel, Remove 30% Of Water Every 30 Days
8K
▲ 0.0%vs. prior month
$82.3K
latest month
12-month trend
B0BGG7Z3N9
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
3K
▲ 50.0%vs. prior month
$49.6K
latest month
12-month trend
B0CGN1TV1G
NICREW Slim Aquarium Filter, Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums, Adjustable Flow, 42 GPH, 3W
3K
▲ 0.0%vs. prior month
$36K
latest month
12-month trend
B0F17J6B2M
AQUANEAT Fish Tank, 1 Gallon Betta Fish Tank, Small Aquarium Kit with LED Light and Water Filter Pump
1K
▲ 0.0%vs. prior month
$26.9K
latest month
12-month trend
B093GZKYM9
hygger Clip On 24/7 Lighting Aquarium LED Light,Sunrise-Daylight-Moonlight and DIY Mode, Adjustable Timer/Brightness Fish Tank Light with 7 Colors for Planted Tank (14W for 12~20in Tank)
1K
▲ 0.0%vs. prior month
$29.4K
latest month
12-month trend
B0FJRNB8PS
1.2 Gallon Acrylic Fish Tank Kit for Kids with Filter and 5-Mode Light | Compact acrylic aquarium for shrimp, aquatic plants, and nano displays; adjustable flow, filter chamber, and flip-top lid
600
▼ 14.3%vs. prior month
$18K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best 5 Gallon Fish Tank Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Tetra is the best-performing 5 gallon fish tank brand in July 2026, moving 8,300 units across 2 ASINs for 45.9% of Top 10 volume. hygger follows with 4,000 units (22.1%), ahead of NICREW on 3,000 units (16.6%).
With 8 brands splitting the Top 10 and 84.5% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $12.99 to $33.14, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Tetra
2 ASINs in Top 10
45.9%
Units
8.3K
Revenue
$99.3K
Avg. price
$33.14
B091D3DTWS
$10.29·★4.5·5.2K revsTetra Water Cleaner Gravel Siphon for Aquariums Up to 55 Gal | Makes Water Changes Easier, Removes Debris From Gravel, Remove 30% Of Water Every 30 Days
Units sold8KB00591C0F8
$55.99·★4.2·5.8K revsTetra Half-Moon 3 Gallon Starter Fish Tank Kit | Aquarium Kit Includes Bubbling LED Air Stone, 3 Gallon Acrylic Tank, Filter & Cartridge, Air Pump, For Small Freshwater Fish
Units sold300
hygger
2 ASINs in Top 10
22.1%
Units
4K
Revenue
$79.1K
Avg. price
$23.49
B0BGG7Z3N9
$16.99·★4.5·703 revshygger 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
Units sold3KB093GZKYM9
$29.99·★4.5·2.9K revshygger Clip On 24/7 Lighting Aquarium LED Light,Sunrise-Daylight-Moonlight and DIY Mode, Adjustable Timer/Brightness Fish Tank Light with 7 Colors for Planted Tank (14W for 12~20in Tank)
Units sold1K
NICREW
1 ASIN in Top 10
16.6%
Units
3K
Revenue
$36K
Avg. price
$12.99
B0CGN1TV1G
$12.99·★4.1·2.9K revsNICREW Slim Aquarium Filter, Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums, Adjustable Flow, 42 GPH, 3W
Units sold3K
Trending 5 Gallon Fish Tank Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B094S81WF4 booked 300 units at $70.99, with ▲ 50.0% MoM change. On the growth side, B08LKC4NLB leads positive momentum with ▲ 100.0% MoM growth on 200 units, with B0F37VGMP1 close behind at ▲ 100.0% MoM on 200 units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B094S81WF4
Koller Products Plastic 6-Gallon AquaView 360 Aquarium Kit for Tropical Fish, Betta Fish with LED Lighting and Power Filter Clear, 4-Piece Set
Price
$70.99
Rating
4.3
Reviews
2.5K
Latest month sales
B08LKC4NLB
Aqueon MiniBow Small Aquarium Starter Kit, All-in-One Desktop Fish Tank for Betta, Shrimp or Small Fish, Includes SmartClean Filter Technology, LED Light and Conditioner, Black, 5 Gallon
Price
$72.95
Rating
4.1
Reviews
5.6K
Latest month sales
B0F37VGMP1
Wonderfactory 5 Gallon Small Aquarium Set Glass Fish Tank 6 Gallon, Starter Kit with Heater Water Pump Cleaning System Filter Bright Light Rocks Gravel Cleaning Tool, Clear Rimless Betta Plants
Unlock to view ASIN details and product titles
Price
$79.99
Rating
4.0
Reviews
134
Latest month sales
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