---
title: "Maracyn 2 — $319K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/maracyn-2"
last_updated: "2026-07-21T20:41:39.026Z"
locale: en
meta:
description: "Niche score 43/100 · $319K/yr market · 170K searches/yr · $19.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $319K/yr market · 170K searches/yr · $19.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Maracyn 2 — $319K/yr Amazon US Niche (2026) - Flapen"
---
# **maracyn 2**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 52Growth 17Conversion 86Competition 10Returns 90Price range 68Avg price 86Brand share 0Review moat 24Quality gap 48
**Returns**
**Great****1.2%**
return rate — above 6% kills the launch gate
**Conversion**
**Great****9.6%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$19.46**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$4.53–$36.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$319K**
$319K/yr · 170K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****5,240.33**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-16.9%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****89%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, maracyn 2 is a $319K/yr Amazon United States market (170K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 43/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **maracyn 2 market data**
- **Units sold / yr**
- **13K–15K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$243K–$292K**
- units × avg price
- **Launch success**
- **—**
- 0 of 1 new (360d)
- **Conversion rate**
- **9.6%**
- **Avg BSR**
- **#128**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **67%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **61 months**
- **Avg seller age**
- **170 days**
## **Competition & brand share**
The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **—flat
**Sellers**
**47**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**89%**
Top 20: 100%
**Open market**
**0%**
- API53% - Fritz Aquatics36% - Seachem8% - Magrank2% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -16.9% search growth over the last 90 days.
4K3KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/maracyn-2/trend)
## **Top maracyn 2 search terms**
- **maracyn**25K/yr-11.1%9.4% conv. - **maracyn 2**22K/yr-10.8%4.5% conv. - **api fin and body cure**15K/yr-2.0%21.0% conv. - **erythromycin for fish**19K/yr-43.7%4.5% conv. - **fritz maracyn**12K/yr-17.1%10.3% conv. - **api em erythromycin**11K/yr-19.4%2.6% conv. - **doxycycline for fish**9K/yr+22.9%0.8% conv. - **furan 2**7K/yr-2.0%4.1% conv. - **tetracycline for fish**6K/yr-20.3%3.5% conv. - **maracyn two**4K/yr+13.9%3.4% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/maracyn-2/search-terms)
## **Top maracyn 2 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%$32K20%$64K30%$96K40%$128K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**API FIN & BODY CURE Freshwater Fish Powder Medication 10-Count Box**API**$16.11**4.4★3,763 rev](https://www.amazon.com/dp/B06XDFJ5XN) [2**Fritz Maracyn - for Saltwater and Freshwater gram-Positive Relief from Bacterial gil Popeye More - Easy dose Packets 20 Count**Fritz Aquatics**$36.23**4.6★304 rev](https://www.amazon.com/dp/B0D31Z3TQM) [3**Kanaplex 5 g(0.18 oz)**Seachem**$10.74**4.6★3,935 rev](https://www.amazon.com/dp/B00CJ0VY8G) [4**API 2 Pack of Fin and Body Cure Freshwater Fish Medication Powder for Treatment of Bacterial Diseases Treats Body Slime Eye Cloud Fin and Tail Rot and Gill Disease (10-Count) (2 items)**API**$25.60**4.5★478 rev](https://www.amazon.com/dp/B07JJ18VZR) [5**API MELAFIX Freshwater Fish Bacterial Infection Remedy 16-Ounce Bottle**API**$14.15**4.5★15,244 rev](https://www.amazon.com/dp/B0002567T6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Magrank Women Checkered Jeans High Waisted Denim Capri Pants Race Day Black White Gingham Stretchy Baggy Jean S**Magrank**$36.89**70 rev7mo ago](https://www.amazon.com/dp/B0G4VCDYTH) [**Fritz Maracyn - for Saltwater and Freshwater gram-Positive Relief from Bacterial gil Popeye More - Easy dose Packets 20 Count**Fritz Aquatics**$36.23**304 rev2y ago](https://www.amazon.com/dp/B0D31Z3TQM) [**Fritz Aquatics ParaCleanse Provides Fast Relief from Parasitic Diseases (20-Count)**Fritz Aquatics**$22.41**376 rev4y ago](https://www.amazon.com/dp/B09F4HV8HH) [**API 2 Pack of Fin and Body Cure Freshwater Fish Medication Powder for Treatment of Bacterial Diseases Treats Body Slime Eye Cloud Fin and Tail Rot and Gill Disease (10-Count) (2 items)**API**$25.60**478 rev7y ago](https://www.amazon.com/dp/B07JJ18VZR) [**API FIN & BODY CURE Freshwater Fish Powder Medication 10-Count Box**API**$16.11**3,763 rev9y ago](https://www.amazon.com/dp/B06XDFJ5XN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Magrank Women Checkered Jeans High Waisted Denim Capri Pants Race Day Black White Gingham Stretchy Baggy Jean S**Magrank**$36.89**4.0★**▲ 300%**](https://www.amazon.com/dp/B0G4VCDYTH) [**API FIN & BODY CURE Freshwater Fish Powder Medication 10-Count Box**API**$16.11**4.4★**▲ 27%**](https://www.amazon.com/dp/B06XDFJ5XN) [**Kanaplex 5 g(0.18 oz)**Seachem**$10.74**4.6★**▲ 16%**](https://www.amazon.com/dp/B00CJ0VY8G) [**API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle**API**$8.47**4.5★**— 3%**](https://www.amazon.com/dp/B0002567SM) [**API 2 Pack of Fin and Body Cure Freshwater Fish Medication Powder for Treatment of Bacterial Diseases Treats Body Slime Eye Cloud Fin and Tail Rot and Gill Disease (10-Count) (2 items)**API**$25.60**4.5★**— 0%**](https://www.amazon.com/dp/B07JJ18VZR)
**~~View all trending →~~**
## **What buyers say about maracyn 2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Great product, Great results ⭐️ Definitely a great product, that WORKS”*
**Value For Money**15%
*“Price is affordable”*
**Ease Of Use**11%
*“Easy to use”*
**Advertised Vs Actual Product**8%
*“Worked as advertised”*
**Strength**6%
*“Strong”*
**Ease Of Cleaning**6%
*“Clean sweep of flukes”*
**Instructions/User Manual/Troubleshooting**6%
*“The instructions are very clear”*
**Color**4%
*“His color is much better”*
**Size-Overall**3%
*“they fit perfect”*
**Comfort-Overall**3%
*“good to have on hand”*
### **What buyers complain about **
**Durability**16%
*“it nearly killed everything in under an hour”*
**Value For Money**14%
*“Which cost me a lot of money”*
**Size-Overall**8%
*“It was enormous”*
**Functionality-Overall**7%
*“Unfortunately, it did not work in my case”*
**Breathability**4%
*“from not being able to breath”*
**Color**4%
*“Red streaks were visible in the fins, faint color and overall miserable”*
**Water Flow**4%
*“Dont use in a 3 gallon tank”*
**Smell**3%
*“the scent also too strong”*
**Leak-Proof**3%
*“the product inside had leaked out some due to a loose cap and no seal”*
**Hard Feel**3%
*“was in very rough shape”*
### **Top return reasons **
**Functionality-Overall**30%
**Advertised Vs Actual Product**14%
**Leak-Proof**12%
**Size-Overall**11%
**Value For Money**10%
**Durability**4%
**Waist Fit**3%
**Defective Material/Parts**3%
**Product Condition**2%
**Contamination**1%
## **Common questions**
- **Is maracyn 2 profitable to sell on Amazon United States?**
- The niche generates $319K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -16.9%. Flapen's verdict: Skip it (43/100).
- **How competitive is the maracyn 2 niche?**
- 4 brands and 47 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in maracyn 2?**
- Top complaints mined from reviews: Durability, Value For Money, Size-Overall. The return rate is 1.2%.
- **When does demand for maracyn 2 peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the maracyn 2 niche?**
- Listings span $4.53–$36.89; the average listing price is $19.46 (sweet spot $15–$100). The average incumbent carries 5,240 reviews — the moat a new listing must climb.
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