rodi
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Review moat
Good760.27avg incumbent reviews — the moat a new listing must climb
Avg price
Good$126.45avg listing price — sweet spot $15–$100
Returns
Okay4.1%return rate — above 6% kills the launch gate
Price range
Okay$46.91–$219.86cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Bad1.4%search→purchase rate — share of searches ending in a sale
Market size
Bad$59K$59K/yr · 33K searches
Competition
Bad83%top-5 click share — a locked-up shelf
Growth
Bad-34.5%90-day search growth — must beat 0% to launch
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, rodi is a $59K/yr Amazon United States market (33K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Sep–Dec. Verdict: Skip it — 27/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
rodi market data
- Units sold / yr
- 750–1K
- avg 100–250/product
- Revenue / yr
- $95K–$126K
- units × avg price
- Launch success
- —
- 1 of 1 new (360d)
- Conversion rate
- 1.4%
- Avg BSR
- #405
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 6.6%
- Avg brand age
- 77 months
- Avg seller age
- 180 days
Competition & brand share
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
11
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
83%
Top 20: 100%
Open market
0%
- Aquatic Life69%
- Geekpure10%
- iSpring9%
- Max Water8%
- Filterelated4%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -34.5% search growth over the last 90 days.Peak months: Jan, Feb, Sep, Dec · busiest ÷ quietest = 3.5×
Top rodi search terms
- rodi filter18K/yr
- ro di system for aquarium7K/yr
- ro/di water filter system for aquarium6K/yr
- rodi system for saltwater aquarium2K/yr
Top rodi 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.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Aquatic Life RO Buddie 4-Stage Aquarium Water Filter System Reverse Osmosis RO/DI Filtration Unit for Fish Tank Fountains and More 50 GPD (Gallons Per Day)
Aquatic Life$68.854.5★5,036 rev
Aquatic Life Twist-in 4-Stage RO/DI Aquarium Water Filter System Reverse Osmosis Filtration with Sediment Carbon Membrane & DI Resin 75 GPD
Aquatic Life$97.474.5★1,082 rev
Geekpure 4 Stage Portable Aquarium Reverse Osmosis RO Drinking Water Filtration System 100 GPD - with DI Filter TDS Close to 0 ppm
Geekpure$57.754.2★562 rev
iSpring RCC1DP Tankless RO/DI System 5 Stage De-ionization Reverse Osmosis Water Filter High Performing 150 GPD Tankless RO Water System for Aquarium with DI Water Filter & Pump
iSpring$219.864.3★100 rev
Aquatic Life 4-Stage Reverse Osmosis Deionization Water Filter System RO/DI Filtration Unit with Carbon Plus Cartridge 100 GPD
Aquatic Life$151.984.3★259 rev
Newest
by launch date
4-Stage Aquarium Reverse Osmosis System with Flushing Valve Portable RO+DI deionized Water Filtration Colour Changing DI Filter 100 GPD-TDS Close to 0 ppm
Filterelated$60.6431 rev
iSpring RCC1DP Tankless RO/DI System 5 Stage De-ionization Reverse Osmosis Water Filter High Performing 150 GPD Tankless RO Water System for Aquarium with DI Water Filter & Pump
iSpring$219.86100 rev
iSpring RCC1D Tankless RO/DI System 5 Stage De-ionization Reverse Osmosis Water Filter System 150 GPD Tankless RO Water Filter System for Aquarium with DI Water Filter
iSpring$170.4536 rev
Aquatic Life 4-Stage Reverse Osmosis Deionization Water Filter System RO/DI Filtration Unit with Carbon Plus Cartridge 100 GPD
Aquatic Life$151.98259 rev
Geekpure 4 Stage Portable Aquarium Reverse Osmosis RO Drinking Water Filtration System 100 GPD - with DI Filter TDS Close to 0 ppm
Geekpure$57.75562 rev
Trending
90-day click momentum4-Stage Aquarium Reverse Osmosis System with Flushing Valve Portable RO+DI deionized Water Filtration Colour Changing DI Filter 100 GPD-TDS Close to 0 ppm
Filterelated$60.644.1★
Max Water 6 Stage Aquarium System/RO Water Filtration System with Deionization Filter RO Water Purifier 100 GPD Hydroponics RODI System (Clear Housing System with TDS Meter)
Max Water$187.534.3★
Max Water 6 Stage Aquarium System/RO Water Filtration System with Deionization Filter RO Water Purifier 100 GPD Hydroponics RODI System (Clear)
Max Water$173.784.1★
Geekpure 3 STAGE Portable Aquarium Reverse Osmosis RO Drinking Water Filter System-100 GPD
Geekpure$46.914.3★
iSpring RCC1D Tankless RO/DI System 5 Stage De-ionization Reverse Osmosis Water Filter System 150 GPD Tankless RO Water Filter System for Aquarium with DI Water Filter
iSpring$170.454.6★
What buyers say about rodi
What buyers praise and complain about, mined from review topics.What buyers love
“Great value”
“Excellent Water Filtration System”
“Great Product”
“Easy to use”
“Exactly what I wanted”
“The installation was straightforward”
“Does the job perfectly”
“Easy to use with water hose”
“As long as its consistent giving you clean water”
“No leaks, easy to set up, works great for what I need”
What buyers complain about
“Leaks like crazy”
“I'm thinking maybe filters bad maybe”
“This is an expensive product”
“system is hard to setup”
“Not well made”
“The instructions suck”
“the flow is not there at all”
“it's kind of a mess to do”
“Wrong sized fittings”
“wastes a ton of water”
Top return reasons
Common questions
- Is rodi profitable to sell on Amazon United States?
- The niche generates $59K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -34.5%. Flapen's verdict: Skip it (27/100).
- How competitive is the rodi niche?
- 5 brands and 11 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in rodi?
- Top complaints mined from reviews: Leak-Proof, Filtration, Value For Money. The return rate is 4.1%.
- When does demand for rodi peak?
- Demand peaks in Jan–Feb–Sep–Dec; the busiest month runs 3.5× the quietest.
- What does it cost to enter the rodi niche?
- Listings span $46.91–$219.86; the average listing price is $126.45 (sweet spot $15–$100). The average incumbent carries 760 reviews — the moat a new listing must climb.