Lung Tank
Worth a lookShows a fragmented shelf (top 5 take 22% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Competition
Great22%top-5 click share — an open shelf
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Review moat
Great240.95avg incumbent reviews — the moat a new listing must climb
Growth
Great+82.2%90-day search growth — must beat 0% to launch
Market size
Good$623K$623K/yr · 684K searches
Brand share
Good68%top-5 brand share — brands hold most of the demand
Avg price
Okay$182.25avg listing price — sweet spot $15–$100
Returns
Bad5.9%return rate — above 5% kills the launch gate
Price range
Bad$29.69–$584.47cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Bad0.5%search→purchase rate — share of searches ending in a sale
Is lung tank profitable on Amazon?
According to Flapen's Amazon United States niche tracking, lung tank is a $623K/yr Amazon United States market (684K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Worth a look — 62/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
lung tank market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 2K–3K
- avg 0–100/product
- Revenue / yr
- $365K–$456K
- units × avg price
- Conversion rate
- 0.5%
- Avg BSR
- #89
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 98%
- Out of stock
- 17.1%
- Avg brand age
- 47 months
- Avg seller age
- 189 days
Competition: brands, sellers & click share
Clicks spread well past the top 5 (22% combined) — an open shelf where new products get seen.Brands
21 falling
Sellers
97
Top-5 brand share
68%
Top 20: 100%
Top-5 click share
22%
Top 20: 53%
Open market
27%
- SMACO21%
- GOYOJO16%
- CHIKADIV13%
- VEVOR12%
- SEBiger6%
- UNAROWHALS5%
lung tank demand & seasonality
Weekly Amazon search volume, last 104 weeks — +82.2% search growth over the last 90 days.Peak months: Jun, Jul, Aug · busiest ÷ quietest = 5.2×
Top lung tank search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- lung tank223K/yr
- scuba tank169K/yr
- mini scuba tank75K/yr
- underwater breathing device27K/yr
- mini scuba tank with pump25K/yr
- lung tank with pump28K/yr
- lungtank16K/yr
- diving tank12K/yr
- diving tanks13K/yr
- dive tank10K/yr
Top lung tank products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SMACO Mini Scuba Tank with Snorkel Mask 0.5L Portable Small Diving Tank with Full Face Diving Mask Reusable DOT Certified Pony Bottle Diving Cylinder Kit with High Pressure Hand Pump for Snorkeling
SMACO$282.053.8★111 rev
VEVOR 0.5L Mini Scuba Tank with Sub-Mask Portable Diving Tank for Underwater Breathing Reusable Lung Diving Cylinder up to 10 Minutes Dive Time Emergency Rescue Pony Bottle with Pump for Snorkeling
VEVOR$108.373.5★12 rev
GOYOJO 0.5L Mini Scuba Tank with Snorkel Mask Portable Underwater Air Supply for Snorkeling & Shallow Dives DOTCertified 58 Min Underwater Breath System
GOYOJO$166.124.0★23 rev
CHIKADIV Mini Scuba Tank with Sub-Mask 0.5L Scuba Tank with Snorkel Mask Lung with Full-face Mask Underwater Breathing Mask E Black
CHIKADIV$216.663.8★24 rev
SMACO Mini Scuba Tank 0.5L Portable Small Diving Tank for Underwater Breathing Reusable Diving Cylinder Lung Air Tank for Emergency Rescue Boat Cleaning Backup Air Source Pony Bottle S300
SMACO$192.174.1★117 rev
Newest
by launch date
Cyl-Tec S80 (80 cu ft) Aluminum Scuba Tank 3000 PSI Convertible DIN/Yoke Valve DOT/TC Certified
Blue Reef$236.782 rev
OIOEEP Mini Scuba Tank with Sub-Mask 0.5L Portable Diving Lung Tank with Refill Adapter for Divers Underwater Breathing Recreational Diving Boat Cleaning Black
OIOEEP$178.911 rev
Portable Lung Tank Mini Scuba Diving Tank with Full Face Mask 0.5L 3000 PSI Underwater Breathing Device 6-10 Mins for Snorkeling Complete Kit with Adapter and Air Pump (Black)
SHYRVOX$173.150 rev
GOYOJO Mini Scuba Tank Portable Diving Lung Air Tank with DOT Certified Refillable Emergency Backup Pony Bottle for Snorkeling Underwater Breathing Training (Obsidian Orange)
GOYOJO$85.635 rev
UNAROWHALS 2.3L Mini Scuba Tank 25-35 Minutes Scuba Diving Tanks DOT-Certified Diving Lung Tank Portable Dive Portable Lungs 2.3L(16 Cu Ft) Capacity 3000 Psi Max Pressure Aluminum Tank
UNAROWHALS$291.385 rev
Trending
90-day click momentumOIOEEP Mini Scuba Tank with Sub-Mask 0.5L Portable Diving Lung Tank with Refill Adapter for Divers Underwater Breathing Recreational Diving Boat Cleaning Black
OIOEEP$178.913.0★
GOYOJO Mini Scuba Tank Portable Diving Lung Air Tank with DOT Certified Refillable Emergency Backup Pony Bottle for Snorkeling Underwater Breathing Training (Obsidian Orange)
GOYOJO$85.634.8★
UNAROWHALS 2.3L Mini Scuba Tank 25-35 Minutes Scuba Diving Tanks DOT-Certified Diving Lung Tank Portable Dive Portable Lungs 2.3L(16 Cu Ft) Capacity 3000 Psi Max Pressure Aluminum Tank
UNAROWHALS$291.385.0★
Portable Lung Tank Mini Scuba Diving Tank with Full Face Mask 0.5L 3000 PSI Underwater Breathing Device 6-10 Mins for Snorkeling Complete Kit with Adapter and Air Pump (Black)
SHYRVOX$173.150.0★
UNAROWHALS 2.3L Mini Scuba Tank 25-35 Minutes Scuba Diving Tanks DOT-Certified Diving Lung Tank Portable Dive Portable Lungs 2.3L(16 Cu Ft) Capacity 3000 Psi Max Pressure Aluminum Tank
UNAROWHALS$293.185.0★
What reviews say buyers love and hate about lung tank
What buyers praise and complain about, mined from review topics.What buyers love
“Build quality is great”
“Easy to wear”
“Worth it”
“Handy”
“As advertised”
“this is light weight has a carry bag”
“Great for water work”
“Easy to put together”
“It's leakproof and an easy refill”
“Fits perfect”
What buyers complain about
“The mask doesn't fit my face well”
“Leaking right outta the box”
“It's difficult to use”
“Part quality suspect”
“and more expensive”
“Takes a while to pump up by hand”
“no way to equalize pressure good surface mask”
“It does not come with directions to start”
“However this only lasted a few minutes”
“it is not TSA approved”
Top return reasons
Common lung tank questions
- Is lung tank profitable to sell on Amazon United States?
- The niche generates $623K/yr across 94 tracked products. 9 of 27 products launched in the last 360 days are still selling. 90-day search growth is +82.2%. Flapen's verdict: Worth a look (62/100).
- How competitive is the lung tank niche?
- 21 brands and 97 sellers compete. The top 5 products take 22% of clicks and top 5 brands hold 68% of demand.
- What do buyers complain about in lung tank?
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Ease Of Use. The return rate is 5.9% — above our launch gate.
- When does demand for lung tank peak?
- Demand peaks in Jun–Jul–Aug; the busiest month runs 5.2× the quietest.
- What does it cost to enter the lung tank niche?
- Listings span $29.69–$584.47; the average listing price is $182.25 (sweet spot $15–$100). The average incumbent carries 241 reviews — the moat a new listing must climb.