---
title: "Gfo — $243K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/gfo"
last_updated: "2026-07-21T17:36:45.796Z"
locale: en
meta:
description: "Niche score 54/100 · $243K/yr market · 65K searches/yr · $33.78 avg price. Soft demand (-12.4% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $243K/yr market · 65K searches/yr · $33.78 avg price. Soft demand (-12.4% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Gfo — $243K/yr Amazon US Niche (2026) - Flapen"
---
# **gfo**
**Worth a look**
Shows low returns (0.5%), but soft demand (-12.4% this quarter) keeps it on the watch list.
Market size 45Growth 19Conversion 91Competition 51Returns 97Price range 85Avg price 95Brand share 27Review moat 66Quality gap 28
**Returns**
**Incredible****0.5%**
return rate — above 6% kills the launch gate
**Avg price**
**Incredible****$33.78**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****11.1%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$5.43–$84.23**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****879.7**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$243K**
$243K/yr · 65K searches
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****89%**
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 ~~](https://flapen.com/research/methodology)
## **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.
2K1KSpike '26Mar '26Mar '26Apr '26May '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/pet-supplies/gfo/trend)
## **Top gfo search terms**
- **gfo**20K/yr-9.0%5.8% conv. - **chemipure**13K/yr-16.1%8.2% conv. - **chemipure elite**11K/yr-9.0%15.3% conv. - **chemi pure**9K/yr-5.7%9.3% conv. - **granular ferric oxide**4K/yr-17.3%5.0% conv. - **chemi pure elite for aquarium**5K/yr-37.2%16.9% conv. - **chemi pure elite**3K/yr+3.9%15.3% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/gfo/search-terms)
## **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.
0%10%$24K20%$49K30%$73K40%$97K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Boyd Enterprises ABE16743 Chemipure Elite for Aquarium 11.74-Ounce**Boyd Enterprises**$16.43**4.6★2,343 rev](https://www.amazon.com/dp/B00BUFTTE2) [2**Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce**Boyd Enterprises**$11.34**4.7★1,474 rev](https://www.amazon.com/dp/B00BS96U60) [3**Boyd Enterprises ABE16743 Chemi-Pure Elite for Aquarium 11.74-Ounce (2 Pack)**Boyd Enterprises**$34.83**4.7★627 rev](https://www.amazon.com/dp/B00ZV1IPLE) [4**Boyd Enterprises ABE16705 Chemipure Filter Media for Aquarium 10-Ounce**Boyd Enterprises**$10.66**4.7★837 rev](https://www.amazon.com/dp/B000255MU6) [5**Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)**Kolar Labs**$39.99**4.4★520 rev](https://www.amazon.com/dp/B06XB9WNS9)
**~~View all top sellers →~~**
### **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**$34.80**7 rev10mo ago](https://www.amazon.com/dp/B0FR53P9WL) [**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**$28.57**65 rev11mo ago](https://www.amazon.com/dp/B0FLKF1M6P) [**Granular Ferric Oxide (GFO) Bayoxide E33-2.25 lbs - 1 021 g - Saltwater & Freshwater Aquarium Filtration Media for Phosphate Removal**Perfect Corals**$59.72**1 rev1y ago](https://www.amazon.com/dp/B0FDH78VQF) [**TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)**TL Reefs**$38.98**277 rev8y ago](https://www.amazon.com/dp/B0773RFPJ6) [**Kolar Labs GFO Bayoxide E33 Phosphate Remover for Freshwater and Saltwater Aquariums Reef Tanks Promotes Coral Health (454g)**Kolar Labs**$39.99**520 rev9y ago](https://www.amazon.com/dp/B06XB9WNS9)
**~~View all new products →~~**
### **Trending**
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)**Go For It Golf**$28.57**4.8★**▲ 296%**](https://www.amazon.com/dp/B0FLKF1M6P) [**Boyd Enterprises ABE16742 Chemipure Elite for Aquarium 6.5-Ounce**Boyd Enterprises**$11.34**4.7★**▲ 294%**](https://www.amazon.com/dp/B00BS96U60) [**Boyd ChemiPure Blue Nano 5Pack Aquarium Filtration Media Premium Carbon + IonExchange Resins in Nylon Bag Clears Toxins Phosphates & Metals**Boyd Enterprises**$14.07**4.8★**▲ 61%**](https://www.amazon.com/dp/B00VXIA3XM) [**TL Reefs GFO Phosphate Remover Granular Ferric Oxide for Saltwater Aquariums (1lb 454g)**TL Reefs**$38.98**4.2★**▲ 49%**](https://www.amazon.com/dp/B0773RFPJ6) [**Seachem PhosGuard 100 mL bagged - 67101850**Seachem**$5.43**4.6★**▲ 48%**](https://www.amazon.com/dp/B00029PO6O)
**~~View all trending →~~**
## **What buyers say about gfo**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**37%
*“Excellent product”*
**Advertised Vs Actual Product**14%
*“Exactly As Described”*
**Durability**11%
*“Seems to last a while”*
**Water Flow**8%
*“Worked great, helped clear up water and filter out bad stuff”*
**Value For Money**8%
*“is very cheap”*
**Ease Of Cleaning**6%
*“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”*
**Ease Of Use**5%
*“Convenient”*
**Water Resistance**2%
*“the water quality is much better”*
**Size-Overall**2%
*“The granular size is perfect for reactors”*
**Pet Friendly**2%
*“fish are happy”*
### **What buyers complain about **
**Functionality-Overall**20%
*“Doesn't work”*
**Value For Money**18%
*“Its initial cost is higher then regular activated carbon/charcoal”*
**Quality-Overall**13%
*“Cheap”*
**Moist/Dry**7%
*“Extremely dried up with old residue”*
**Ease Of Use**7%
*“Too Fine for Use”*
**Durability**7%
*“Bags keep breaking now”*
**Ease Of Cleaning**7%
*“Impossible to clean and use”*
**Leak-Proof**3%
*“all over my stairs as some even leaked out of the box flaps while it sat there”*
**Design-Overall**3%
*“Bucket design needs improvement”*
**Rusts/Corrodes**3%
*“Excessive rust color”*
### **Top return reasons **
**Size-Overall**18%
**Product Condition**15%
**Filtration**11%
**Moist/Dry**9%
**Advertised Vs Actual Product**8%
**Leak-Proof**8%
**Value For Money**6%
**Functionality-Overall**5%
**Defective Material/Parts**3%
**Contamination**2%
## **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.
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