Gfo
MaybeAn estimated 0.5% of orders come back. But demand is soft, at -12.4% this quarter, so Gfo is a Maybe.
- Flapen Score
- 54 / 100Top 34% of 3,978 Pet Supplies niches · +3 vs the category median of 5154
- Market size
- $243K/yr65K searches / yr
- 90-day growth
- -12.4%search demand this quarter
- Competition
- 54%top-5 click share · 9 brands · 58 sellers
Flapen Score
Gfo against its category
The dotted line is the Pet Supplies average. Past it, Gfo is stronger. Inside it, weaker.
Market
The Gfo market on Amazon at a glance
Shoppers on Amazon United States searched for Gfo 65K times last year and spent an estimated $243K. The top 5 brands take 89% of clicks. Flapen scores it 54 out of 100, a Maybe.
01 · Demand
An estimated 11.1% of those searches ended in a purchase.
Shoppers searched for this 65K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 11.1% of those searches ended in a purchase. Searches in the last 90 days moved -12.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $243K a year.
- Searches, last 12 months
- 65K
- Growth, 90 days vs prior 90
- -12.4%
- Conversion, latest week
- 11.1%
- Market size, estimated
- $243Ka year
- Top search term
- gfo20K searches a year
02 · Price
A sale here is worth $33.78.
Listings sell for $33.78 on average, from $5.43 to $84.23. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At $33.78 that is $8K to $17K a year per listing.
- Average price
- $33.78inside the $15 to $100 sweet spot
- Price range
- $5.43–$84.23
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 6K–8K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $8K–$17K
- Returns
- 0.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
43% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #448 within Fish & Aquatic Pets. It carries 880 reviews at 4.58 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 43%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #448in Fish & Aquatic Pets
- Average rating
- 4.58 starsAmazon United States average 4.42 stars
- Average reviews
- 880per listing
- Listings tracked
- 23
04 · Newcomers
0 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 86 months on average, so the names here are established.
- Launched, last 12 months
- 2
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 86 months
Products
Top Gfo 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
Boyd Enterprises ABE16743 Chemipure Elite for Aquarium 11.74-Ounce
- Price
- $16.43
- Rating
- 4.6/5
- Reviews
- 2,343
- Age
- 19y ago

Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce
- Price
- $11.34
- Rating
- 4.7/5
- Reviews
- 1,474
- Age
- 18y ago

Boyd Enterprises ABE16743 Chemi-Pure Elite for Aquarium 11.74-Ounce (2 Pack)
- Price
- $34.83
- Rating
- 4.7/5
- Reviews
- 627
- Age
- 12y ago

Boyd Enterprises ABE16705 Chemipure Filter Media for Aquarium 10-Ounce
- Price
- $10.66
- Rating
- 4.7/5
- Reviews
- 837
- Age
- 24y ago

Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)
- Price
- $39.99
- Rating
- 4.4/5
- Reviews
- 520
- Age
- 9y ago
Trending
estimated 90-day click momentum
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)
- Price
- $28.57
- Rating
- 4.8/5
- Reviews
- 65
- Age
- 11mo ago

Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce
- Price
- $11.34
- Rating
- 4.7/5
- Reviews
- 1,474
- Age
- 18y ago

Boyd ChemiPure Blue Nano 5Pack Aquarium Filtration Media Premium Carbon + IonExchange Resins in Nylon Bag Clears Toxins Phosphates & Metals
- Price
- $14.07
- Rating
- 4.8/5
- Reviews
- 819
- Age
- 11y ago

TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)
- Price
- $38.98
- Rating
- 4.2/5
- Reviews
- 277
- Age
- 8y ago

Seachem PhosGuard 100 mL bagged - 67101850
- Price
- $5.43
- Rating
- 4.6/5
- Reviews
- 2,001
- Age
- 20y ago
Newest
by launch date
Granular Ferric Oxide (GFO) Bayoxide E33-1.0 lb - 454 g - Saltwater & Freshwater Aquarium Filtration Media for Phosphate Removal
- Price
- $34.80
- Rating
- 3.8/5
- Reviews
- 7
- Age
- 10mo ago

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)
- Price
- $28.57
- Rating
- 4.8/5
- Reviews
- 65
- Age
- 11mo ago

Granular Ferric Oxide (GFO) Bayoxide E33-2.25 lbs - 1 021 g - Saltwater & Freshwater Aquarium Filtration Media for Phosphate Removal
- Price
- $59.72
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 1y ago

TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)
- Price
- $38.98
- Rating
- 4.2/5
- Reviews
- 277
- Age
- 8y ago

Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)
- Price
- $39.99
- Rating
- 4.4/5
- Reviews
- 520
- Age
- 9y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 54% of clicks. Leaders hold, but buyers still shop past them.
Brands
9 rising
Sellers
58
Est. top-5 brand share
89%
Top 20: 100%
Est. 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
Gfo search demand
Weekly searches over the year. Pick a range.
Search terms
Top Gfo search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- gfo20K/yr
- chemipure13K/yr
- chemipure elite11K/yr
- chemi pure9K/yr
- granular ferric oxide4K/yr
- chemi pure elite for aquarium5K/yr
- chemi pure elite3K/yr
Reviews and returns
What reviews say buyers love and hate about Gfo
We read the reviews and the return reasons for every product selling here.
“Doesn't work”
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 Gfo 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









