gfo
Worth a lookShows low returns (0.5%), but soft demand (-12.4% this quarter) keeps it on the watch list.
Returns
Incredible0.5%return rate — above 6% kills the launch gate
Avg price
Incredible$33.78avg listing price — sweet spot $15–$100
Conversion
Great11.1%search→purchase rate — share of searches ending in a sale
Price range
Great$5.43–$84.23cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good879.7avg incumbent reviews — the moat a new listing must climb
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Market size
Okay$243K$243K/yr · 65K searches
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Growth
Bad-12.4%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, gfo is a $243K/yr Amazon United States market (65K searches/yr). The top 5 brands hold 89% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
gfo market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- $203K–$270K
- units × avg price
- Launch success
- —
- 0 of 2 new (360d)
- Conversion rate
- 11.1%
- Avg BSR
- #448
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 43%
- Out of stock
- 0.0%
- Avg brand age
- 86 months
- Avg seller age
- 151 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
9 rising
Sellers
58
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
54%
Top 20: 97%
Open market
8%
- Boyd Enterprises67%
- Kolar Labs10%
- Chemi Pure Blue5%
- TL Reefs4%
- Perfect Corals3%
- Seachem3%
- Open — no brand owns it (3 brands, 8%)
Demand
Weekly Amazon search volume, last 20 weeks — -12.4% search growth over the last 90 days.Top gfo search terms
- gfo20K/yr
- chemipure13K/yr
- chemipure elite11K/yr
- chemi pure9K/yr
- granular ferric oxide4K/yr
- chemi pure elite for aquarium5K/yr
- chemi pure elite3K/yr
Top gfo 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 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Boyd Enterprises ABE16743 Chemipure Elite for Aquarium 11.74-Ounce
Boyd Enterprises$16.434.6★2,343 rev
Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce
Boyd Enterprises$11.344.7★1,474 rev
Boyd Enterprises ABE16743 Chemi-Pure Elite for Aquarium 11.74-Ounce (2 Pack)
Boyd Enterprises$34.834.7★627 rev
Boyd Enterprises ABE16705 Chemipure Filter Media for Aquarium 10-Ounce
Boyd Enterprises$10.664.7★837 rev
Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)
Kolar Labs$39.994.4★520 rev
Newest
by launch date
Granular Ferric Oxide (GFO) Bayoxide E33-1.0 lb - 454 g - Saltwater & Freshwater Aquarium Filtration Media for Phosphate Removal
Perfect Corals$34.807 rev
Golf Glove Voted #1 for Comfort at The Professional Golf Merchandise Show in Orlando Premium Cabretta Leather Magnet-Driven Airflow to Stay Dry Between Shots (2pk M/L)
Go For It Golf$28.5765 rev
Granular Ferric Oxide (GFO) Bayoxide E33-2.25 lbs - 1 021 g - Saltwater & Freshwater Aquarium Filtration Media for Phosphate Removal
Perfect Corals$59.721 rev
TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)
TL Reefs$38.98277 rev
Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)
Kolar Labs$39.99520 rev
Trending
90-day click momentumGolf Glove Voted #1 for Comfort at The Professional Golf Merchandise Show in Orlando Premium Cabretta Leather Magnet-Driven Airflow to Stay Dry Between Shots (2pk M/L)
Go For It Golf$28.574.8★
Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce
Boyd Enterprises$11.344.7★
Boyd ChemiPure Blue Nano 5Pack Aquarium Filtration Media Premium Carbon + IonExchange Resins in Nylon Bag Clears Toxins Phosphates & Metals
Boyd Enterprises$14.074.8★
TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)
TL Reefs$38.984.2★
Seachem PhosGuard 100 mL bagged - 67101850
Seachem$5.434.6★
What buyers say about gfo
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent product”
“Exactly As Described”
“Seems to last a while”
“Worked great, helped clear up water and filter out bad stuff”
“is very cheap”
“Since hand removing most of what I can find, getting more clean up crews like hermit crabs and snails, and added the chemipure my GHA problem has nearly completely gone away”
“Convenient”
“the water quality is much better”
“The granular size is perfect for reactors”
“fish are happy”
What buyers complain about
“Doesn't work”
“Its initial cost is higher then regular activated carbon/charcoal”
“Cheap”
“Extremely dried up with old residue”
“Too Fine for Use”
“Bags keep breaking now”
“Impossible to clean and use”
“all over my stairs as some even leaked out of the box flaps while it sat there”
“Bucket design needs improvement”
“Excessive rust color”
Top return reasons
Common questions
- Is gfo profitable to sell on Amazon United States?
- The niche generates $243K/yr across 23 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -12.4%. Flapen's verdict: Worth a look (54/100).
- How competitive is the gfo niche?
- 9 brands and 58 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in gfo?
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.5%.
- What does it cost to enter the gfo niche?
- Listings span $5.43–$84.23; the average listing price is $33.78 (sweet spot $15–$100). The average incumbent carries 880 reviews — the moat a new listing must climb.