20 Gallon Tank
FailBuyers convert on only 0.3% of searches, so 20 Gallon Tank is a Fail.
- Flapen Score
- 37 / 100Ranks 3,590 of 3,978 Pet Supplies niches · −14 vs the category median of 5137
- Market size
- $89K/yr208K searches / yr
- 90-day growth
- +8.1%search demand this quarter
- Competition
- 66%top-5 click share · 12 brands · 20 sellers
Flapen Score
20 Gallon Tank against its category
The dotted line is the Pet Supplies average. Past it, 20 Gallon Tank is stronger. Inside it, weaker.
Market
The 20 Gallon Tank market on Amazon at a glance
Shoppers on Amazon United States searched for 20 Gallon Tank 208K times last year and spent an estimated $89K. The top 5 brands take 83% of clicks. Demand peaks in Sep. Flapen scores it 37 out of 100, a Fail.
01 · Demand
An estimated 0.3% of those searches ended in a purchase.
Shoppers searched for this 208K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 0.3% of those searches ended in a purchase. Searches in the last 90 days moved +8.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $89K a year.
- Searches, last 12 months
- 208K
- Growth, 90 days vs prior 90
- +8.1%
- Conversion, latest week
- 0.3%
- Market size, estimated
- $89Ka year
- Peak month
- September3.2× the quietest month
- Top search term
- 20 gallon tank80K searches a year
02 · Price
A sale here is worth $138.13.
Listings sell for $138.13 on average, from $3.54 to $292.75. Amazon reports units sold in ranges. This niche sold 500 to 750 a year. The average listing sells 0 to 100 of them. At $138.13 that is $0 to $14K a year per listing.
- Average price
- $138.13above the $15 to $100 sweet spot
- Price range
- $3.54–$292.75
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 500–750
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$14K
- Returns
- 3.2%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
65% of listings pay for placement with sponsored ads. 82% ship with Prime. On an average day, 17.5% of listings are out of stock. The average listing ranks #84 within Fish & Aquatic Pets. It carries 1,114 reviews at 4.33 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 65%
- Prime listings
- 82%
- Out of stock, average day
- 17.5%
- Average rank
- #84in Fish & Aquatic Pets
- Average rating
- 4.33 starsAmazon United States average 4.42 stars
- Average reviews
- 1,114per listing
- Listings tracked
- 17
04 · Newcomers
4 of last year's 6 launches cleared the first-year sales bar.
6 products launched here in the last 12 months. 4 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 39 months on average, so the names here are settling in.
- Launched, last 12 months
- 6
- Successful launches
- 4Amazon's first-year sales bar
- Average brand age
- 39 months
Products
Top 20 Gallon Tank products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
AQUANEAT Aquarium Net with Extendable Long Handle Adjustable Wastes Skimming Cleaning Tools for Fish Tanks 3 inch
- Price
- $3.54
- Rating
- 4.5/5
- Reviews
- 1,853
- Age
- 4y ago

Tetra Aquarium 20 Gallon Complete Tropical Fish Tank Kit With LED Lighting And Decor For Freshwater Fish
- Price
- $123.28
- Rating
- 4.3/5
- Reviews
- 3,796
- Age
- 10y ago

Magnetic Aquarium Cover lid Fish Tank lid Anti-Jumping net Cover mesh lid Aquarium Hood
- Price
- $18.64
- Rating
- 4.1/5
- Reviews
- 492
- Age
- 2y ago

Aqueon Aquarium 20 Gallon Long
- Price
- $150.15
- Rating
- 4.0/5
- Reviews
- 544
- Age
- 15y ago

Tetra Glass Aquarium 29 Gallons Rectangular Fish Tank
- Price
- $131.16
- Rating
- 4.6/5
- Reviews
- 998
- Age
- 6y ago
Trending
estimated 90-day click momentum
Coospider 20 Gallon Glass Fish Tank Aquarium Starter Kit Simple Self-Cleaning Aquarium with 3-Color LED Lights with Quiet Filter Pump with Temperature Monitoring for Fish Shrimp Kids Gift Ideas
- Price
- $185.20
- Rating
- 3.8/5
- Reviews
- 196
- Age
- 6mo ago

Aqueon Glass 20 Gallon Long Tank for Aquariums & Terrariums
- Price
- $87.32
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 1mo ago

AQUANEAT Aquarium Net with Extendable Long Handle Adjustable Wastes Skimming Cleaning Tools for Fish Tanks 3 inch
- Price
- $3.54
- Rating
- 4.5/5
- Reviews
- 1,853
- Age
- 4y ago

20 Gallon Glass Fish Tank Standard Aquarium Fish Tank Rimless Low Iron Aquarium for Betta/Turtle/Goldfish/Snails/Shrimp and Aquatic Planting
- Price
- $197.80
- Rating
- 5.0/5
- Reviews
- 8
- Age
- 5mo ago

SubstrateSource 20 Gallon Glass Aquarium - 24 x 12.5 x 17.25 in - Large Clear Rectangular Rimmed Freshwater/Saltwater Fish Tank for Betta Goldfish Guppy Shrimp for Home or Office Aquascaping
- Price
- $89.57
- Rating
- 4.2/5
- Reviews
- 32
- Age
- 10mo ago
Newest
by launch date
Aqueon Glass 20 Gallon Long Tank for Aquariums & Terrariums
- Price
- $87.32
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 1mo ago

20 Gallon Glass Fish Tank Standard Aquarium Fish Tank Rimless Low Iron Aquarium for Betta/Turtle/Goldfish/Snails/Shrimp and Aquatic Planting
- Price
- $197.80
- Rating
- 5.0/5
- Reviews
- 8
- Age
- 5mo ago

Coospider 20 Gallon Glass Fish Tank Aquarium Starter Kit Simple Self-Cleaning Aquarium with 3-Color LED Lights with Quiet Filter Pump with Temperature Monitoring for Fish Shrimp Kids Gift Ideas
- Price
- $185.20
- Rating
- 3.8/5
- Reviews
- 196
- Age
- 6mo ago

Ultra Clear Glass Aquarium Thickened Large Fish Tank -Suitable for High-end Fish Enthusiasts (29 Gallon Tank)
- Price
- $126.91
- Rating
- 4.0/5
- Reviews
- 56
- Age
- 10mo ago

SubstrateSource 20 Gallon Glass Aquarium - 24 x 12.5 x 17.25 in - Large Clear Rectangular Rimmed Freshwater/Saltwater Fish Tank for Betta Goldfish Guppy Shrimp for Home or Office Aquascaping
- Price
- $89.57
- Rating
- 4.2/5
- Reviews
- 32
- Age
- 10mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 66% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 falling
Sellers
20
Est. top-5 brand share
83%
Top 20: 100%
Est. top-5 click share
66%
Top 20: 100%
Open market
14%
- AQUANEAT36%
- Tetra22%
- Aqueon14%
- NestBasics7%
- SubstrateSource4%
- Lifegard3%
- Open — no brand owns it (6 brands, 14%)
Demand
20 Gallon Tank search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Sep · busiest ÷ quietest = 3.2×
Search terms
Top 20 Gallon Tank search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- 20 gallon tank80K/yr
- 20 gallon long fish tank54K/yr
- 20 gallon long aquarium12K/yr
- 20 gallon fish tank with lid8K/yr
- 20 gallon fish tank long6K/yr
- 20 gal tank5K/yr
- fish tank 15+ gallon3K/yr
- 20 gallon aquarium tank4K/yr
- 20 gallon tall fish tank6K/yr
- 20 gal long fish tank4K/yr
Reviews and returns
What reviews say buyers love and hate about 20 Gallon Tank
We read the reviews and the return reasons for every product selling here.
“realized the filter was terrible”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 20 Gallon Tank questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









