---
title: "30 Gallon Fish Tank — $112K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/30-gallon-fish-tank"
last_updated: "2026-07-21T17:14:05.292Z"
locale: en
meta:
description: "Niche score 37/100 · $112K/yr market · 124K searches/yr · $210.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · $112K/yr market · 124K searches/yr · $210.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "30 Gallon Fish Tank — $112K/yr Amazon US Niche (2026) - Flapen"
---
# **30 gallon fish tank**
**Skip it**
Prices mostly outside the sweet spot ($18.64–$2431.46) — this niche doesn't clear our bar today.
Market size 27Growth 23Conversion 5Competition 56Returns 33Price range 3Avg price 45Brand share 37Review moat 53Quality gap 90
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****52%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Good****1,397.76**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****$210.54**
avg listing price — sweet spot $15–$100
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Returns**
**Okay****5.1%**
return rate — above 6% kills the launch gate
**Market size**
**Okay****$112K**
$112K/yr · 124K searches
**Growth**
**Bad****-4.6%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.4%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Bad****$18.64–$2431.46**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, 30 gallon fish tank is a $112K/yr Amazon United States market (124K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jan–Dec. Verdict: Skip it — 37/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **30 gallon fish tank market data**
- **Units sold / yr**
- **250–500**
- avg 0–100/product
- **Revenue / yr**
- **$53K–$105K**
- units × avg price
- **Launch success**
- **50%**
- 6 of 12 new (360d)
- **Conversion rate**
- **0.4%**
- **Avg BSR**
- **#115**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **66%**
- **Out of stock**
- **19.6%**
- **Avg brand age**
- **36 months**
- **Avg seller age**
- **167 days**
## **Competition & brand share**
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **—flat
**Sellers**
**23**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**52%**
Top 20: 91%
**Open market**
**15%**
- Tetra40% - Aqueon19% - COOSPIDER10% - GloFish7% - SubstrateSource7% - CLBA3% - Open — no brand owns it (11 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -4.6% search growth over the last 90 days.
8K6KHoliday '24Prime Day '25Black Friday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Dec · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/30-gallon-fish-tank/trend)
## **Top 30 gallon fish tank search terms**
- **20 gallon aquarium**63K/yr-1.3%0.4% conv. - **aquarium 20 gallon**11K/yr+7.3%0.3% conv. - **20 gallon aquarium kit**12K/yr-14.0%0.4% conv. - **fish tank 20+ gallon**9K/yr+2.7%0.3% conv. - **20 gallon tall fish tank**6K/yr-22.9%0.1% conv. - **huge fish tank**4K/yr+5.5%0.0% conv. - **10 gallon acrylic aquarium**4K/yr+18.9%0.0% conv. - **aquariums 20 gallon**5K/yr+8.2%0.0% conv. - **aquarium large**3K/yr-24.9%0.1% conv. - **aquarium tank 20 gallon**2K/yr+18.0%0.3% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/30-gallon-fish-tank/search-terms)
## **Top 30 gallon fish tank 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%5%$6K10%$11K15%$17K20%$22K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted
All 29 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Tetra Aquarium 20 Gallon Complete Tropical Fish Tank Kit With LED Lighting And Decor For Freshwater Fish**Tetra**$123.28**4.3★3,796 rev](https://www.amazon.com/dp/B013BXDZ90) [2**Tetra ColorFusion Aquarium 20 Gallon Fish Tank Kit Includes LED Lighting and Decor**Tetra**$132.90**4.3★3,796 rev](https://www.amazon.com/dp/B013BXDXTC) [3**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**COOSPIDER**$185.20**3.8★196 rev](https://www.amazon.com/dp/B0GFK4FMMT) [4**Aqueon Aquarium Starter Kit with Smart Clean Filtration and LED Lighting Freshwater and Saltwater Fish 20-Gallon**Aqueon**$179.13**4.3★2,482 rev](https://www.amazon.com/dp/B0DT1NMX61) [5**Tetra Glass Aquarium 29 Gallons Rectangular Fish Tank**Tetra**$131.16**4.6★998 rev](https://www.amazon.com/dp/B08BJ9FQY7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Aqueon Glass 20 Gallon Long Tank for Aquariums & Terrariums**Aqueon**$87.32**0 rev1mo ago](https://www.amazon.com/dp/B0H3MKJV7B) [**Aqueon Standard Glass Rectangle Aquarium Tank 20 Gallon High Fish Tank High-Clarity Glass Construction Freshwater & Saltwater Compatible Black Trim 25 x 13.25 x 17.25**Aqueon**$95.09**0 rev2mo ago](https://www.amazon.com/dp/B0GZZR5XDN) [**20 Gallon Fish Tank Smart Aquarium Kit Glass Small Aquarium Starter Kits Self Cleaning with 3 Types of LED Lights and Filter Water Pump Water Temperature Detection Ultra Quiet Gift for Kid**TARARIUM**$197.13**1 rev3mo ago](https://www.amazon.com/dp/B0GVY18QWW) [**20-29 Gallon Fish Tank Stand Aquarium Stand with Power Outlet Heavy-Duty Reptile Terrarium Stand Table with Top Shelf for 20 Gal Long/High/Extra Long & 29 Gal 30.7L x 15.3W x 30H (Black)**Rymeera**$86.91**82 rev3mo ago](https://www.amazon.com/dp/B0GVMKSLBS) [**20 Gallon Glass Fish Tank Standard Aquarium Fish Tank Rimless Low Iron Aquarium for Betta/Turtle/Goldfish/Snails/Shrimp and Aquatic Planting**CLBA**$197.80**8 rev5mo ago](https://www.amazon.com/dp/B0GKFLPB1W)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**20-29 Gallon Fish Tank Stand Aquarium Stand with Power Outlet Heavy-Duty Reptile Terrarium Stand Table with Top Shelf for 20 Gal Long/High/Extra Long & 29 Gal 30.7L x 15.3W x 30H (Black)**Rymeera**$86.91**4.6★**▲ 223%**](https://www.amazon.com/dp/B0GVMKSLBS) [**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**COOSPIDER**$185.20**3.8★**▲ 220%**](https://www.amazon.com/dp/B0GFK4FMMT) [**Aqueon Glass 20 Gallon Long Tank for Aquariums & Terrariums**Aqueon**$87.32**0.0★**▲ 220%**](https://www.amazon.com/dp/B0H3MKJV7B) [**AQUA DAREN 15 Gallon Rimless Aquarium Fish Tank Ultra-Clear Nano Glass Rectangular Fish Tank L19.6W13H13.8 Thickness 6mm Glass Aquarium (L 15 Gallons)**AQUA DAREN**$94.50**4.8★**▲ 219%**](https://www.amazon.com/dp/B0G43MFYWG) [**Aqueon Standard Glass Rectangle Aquarium Tank 20 Gallon High Fish Tank High-Clarity Glass Construction Freshwater & Saltwater Compatible Black Trim 25 x 13.25 x 17.25**Aqueon**$95.09**0.0★**▲ 219%**](https://www.amazon.com/dp/B0GZZR5XDN)
**~~View all trending →~~**
## **What buyers say about 30 gallon fish tank**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“High quality tank”*
**Value For Money**9%
*“Great Value”*
**Filtration**9%
*“the filter works really well”*
**Size-Overall**7%
*“Great size”*
**Design-Overall**6%
*“The look is superb”*
**Advertised Vs Actual Product**5%
*“As expected”*
**Strength**5%
*“Solid construction”*
**Ease Of Use**3%
*“Easy to take on”*
**Thickness**3%
*“Nice thick glass and well sealed”*
**Instructions/User Manual/Troubleshooting**3%
*“the instructions are clear”*
### **What buyers complain about **
**Filtration**19%
*“Not a great filter”*
**Durability**9%
*“It simply broke”*
**Leak-Proof**8%
*“Leaks”*
**Instructions/User Manual/Troubleshooting**6%
*“poor instructions”*
**Quality-Overall**5%
*“Horrible quality”*
**Size-Overall**4%
*“wrong size”*
**Water Flow**4%
*“The lowest setting won't move the water at all, the medium setting isn't even a trickle, and the highest”*
**Assembly/Installation**4%
*“hard to put together”*
**Advertised Vs Actual Product**3%
*“The pictures are kind of misleading”*
**Adhesion/Stickiness**3%
*“The adhesive is very weak”*
### **Top return reasons **
**Size-Overall**46%
**Filtration**20%
**Defective Material/Parts**6%
**Functionality-Overall**5%
**Value For Money**3%
**Advertised Vs Actual Product**3%
**Leak-Proof**3%
**Compatibility-Overall**2%
**Product Condition**1%
**Assembly/Installation**1%
## **Common questions**
- **Is 30 gallon fish tank profitable to sell on Amazon United States?**
- The niche generates $112K/yr across 29 tracked products. 6 of 12 products launched in the last 360 days are still selling. 90-day search growth is -4.6%. Flapen's verdict: Skip it (37/100).
- **How competitive is the 30 gallon fish tank niche?**
- 17 brands and 23 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in 30 gallon fish tank?**
- Top complaints mined from reviews: Filtration, Durability, Leak-Proof. The return rate is 5.1%.
- **When does demand for 30 gallon fish tank peak?**
- Demand peaks in Jan–Dec; the busiest month runs 2.2× the quietest.
- **What does it cost to enter the 30 gallon fish tank niche?**
- Listings span $18.64–$2431.46; the average listing price is $210.54 (sweet spot $15–$100). The average incumbent carries 1,398 reviews — the moat a new listing must climb.
## **Related niches in Pet Supplies**
- 73 [**phosphate test kit**](https://flapen.com/research/us/pet-supplies/phosphate-test-kit)$194K/yr+152.5%**Worth a look**- 73 [**flea repellent for dogs**](https://flapen.com/research/us/pet-supplies/flea-repellent-for-dogs)$1.7M/yr+136.7%**Launch it**- 73 [**kitten bottles for nursing**](https://flapen.com/research/us/pet-supplies/kitten-bottles-for-nursing)$457K/yr+166.2%**Worth a look**- 73 [**dog stake**](https://flapen.com/research/us/pet-supplies/dog-stake)$573K/yr+55.9%**Worth a look**- 73 [**bully sticks**](https://flapen.com/research/us/pet-supplies/bully-sticks)$12.4M/yr-6.9%**Worth a look**- 73 [**pet oral tartar remover spray**](https://flapen.com/research/us/pet-supplies/pet-oral-tartar-remover-spray)$100K/yr>1,000%**Worth a look**[**All Pet Supplies niches **](https://flapen.com/research/us/pet-supplies)