---
title: "Fish Medicine for Freshwater — $44K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/fish-medicine-for-freshwater"
last_updated: "2026-07-21T22:11:23.114Z"
locale: en
meta:
description: "Niche score 45/100 · $44K/yr market · 44K searches/yr · $16.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $44K/yr market · 44K searches/yr · $16.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Fish Medicine for Freshwater — $44K/yr Amazon US Niche (2026) - Flapen"
---
# **fish medicine for freshwater**
**Skip it**
A small market ($44K/yr) — this niche doesn't clear our bar today.
Market size 11Growth 17Conversion 67Competition 64Returns 95Price range 84Avg price 79Brand share 20Review moat 24Quality gap 40
**Returns**
**Incredible****0.9%**
return rate — above 6% kills the launch gate
**Price range**
**Great****$4.53–$80.57**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$16.46**
avg listing price — sweet spot $15–$100
**Conversion**
**Good****6.0%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****47%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****5,028.44**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-16.8%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$44K**
$44K/yr · 44K searches
According to Flapen's Amazon United States niche tracking, fish medicine for freshwater is a $44K/yr Amazon United States market (44K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 45/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fish medicine for freshwater market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$49K–$66K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **6.0%**
- **Avg BSR**
- **#86**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **63%**
- **Out of stock**
- **3.6%**
- **Avg brand age**
- **110 months**
- **Avg seller age**
- **164 days**
## **Competition & brand share**
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▼falling
**Sellers**
**81**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**47%**
Top 20: 89%
**Open market**
**5%**
- API56% - Seachem15% - MICROBE-LIFT10% - Fritz Aquatics6% - Hikari5% - Kordon3% - Open — no brand owns it (3 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 76 weeks — -16.8% search growth over the last 90 days.
1K600Spike '25 seasonFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/fish-medicine-for-freshwater/trend)
## **Top fish medicine for freshwater search terms**
- **fish medicine**22K/yr-14.9%5.7% conv. - **fish medicine for freshwater**12K/yr-28.3%7.2% conv. - **fish medication**5K/yr-8.3%4.9% conv. - **fish parasite treatment**5K/yr-11.4%5.8% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/fish-medicine-for-freshwater/search-terms)
## **Top fish medicine for freshwater 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%4%$2K8%$4K12%$5K16%$7K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 32 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**API MELAFIX Freshwater Fish Bacterial Infection Remedy 16-Ounce Bottle**API**$14.15**4.5★15,244 rev](https://www.amazon.com/dp/B0002567T6) [2**API LIQUID SUPER ICK CURE Fish remedy Freshwater and Saltwater Fish Medication 4 fl oz(Pack of 1) White**API**$7.23**4.5★11,785 rev](https://www.amazon.com/dp/B0002ASG9K) [3**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) [4**API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle**API**$8.47**4.5★15,244 rev](https://www.amazon.com/dp/B0002567SM) [5**API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 16-Ounce Bottle**API**$11.89**4.5★8,102 rev](https://www.amazon.com/dp/B000256ESA)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**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) [**API Liquid Super ICK Cure Freshwater and Saltwater Fish Medication 16-Ounce Bottle**API**$19.97**11,785 rev4y ago](https://www.amazon.com/dp/B09FFQBKSX) [**Fritz Aquatics ParaCleanse Provides Fast Relief from Parasitic Diseases (20-Count)**Fritz Aquatics**$22.41**376 rev4y ago](https://www.amazon.com/dp/B09F4HV8HH) [**MICROBE-LIFT ART08 Artemiss Immune Booster and Disease Treatment for Fish Health in Freshwater and Saltwater Aquariums 8 Fl Oz**MICROBE-LIFT**$14.24**316 rev6y ago](https://www.amazon.com/dp/B0828D1H21) [**Absolute Wormer - Freshwater and Saltwater Fish Powder Medication. with parasites and Flukes. (5G - Treats 600 GALLONS)**Absolute Wormer**$23.76**434 rev6y ago](https://www.amazon.com/dp/B085Z1QF2Y)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MICROBE-LIFT Special Blend Aquarium Water Care Treatment Cleaner & Clarifier for Fresh and Saltwater Fish Tanks Reduces Maintenance & Helps with Aquarium Algae Control and Odor 4 Ounces (SBH04)**MICROBE-LIFT**$9.02**4.3★**▲ 196%**](https://www.amazon.com/dp/B007B4XBU4) [**MICROBE-LIFT Herbtana Fish Medicine Immune Booster and Parasite Treatment for Aquarium Fish Health Ich Treatment Use in Freshwater Tank or Saltwater Aquarium 8 Ounces (HERB08)**MICROBE-LIFT**$12.93**4.2★**▲ 163%**](https://www.amazon.com/dp/B07YVW626R) [**Seachem ParaGuard 500 mL / 16.9 fl. oz. - 603**Seachem**$17.06**4.7★**▲ 154%**](https://www.amazon.com/dp/B002DWTIU6) [**Seachem KanaPlex Size: 100 g Treats Fungal and Bacterial Fish Diseases**Seachem**$80.57**4.6★**▲ 77%**](https://www.amazon.com/dp/B006OOPGOQ) [**Seachem ParaGuard 250ml**Seachem**$12.15**4.6★**▲ 72%**](https://www.amazon.com/dp/B0002A5X7I)
**~~View all trending →~~**
## **What buyers say about fish medicine for freshwater**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Excellent product”*
**Value For Money**12%
*“Price is affordable”*
**Ease Of Use**12%
*“Easy to use”*
**Advertised Vs Actual Product**8%
*“Worked as advertised”*
**Instructions/User Manual/Troubleshooting**7%
*“The instructions are very clear”*
**Smell**5%
*“Theres a very mild scent”*
**Color**3%
*“Its very pretty”*
**Ease Of Cleaning**2%
*“Clean sweep of flukes”*
**Water Flow**2%
*“It helps promote clear water”*
**Strength**2%
*“Strong”*
### **What buyers complain about **
**Contamination**10%
*“there were worms almost everywhere in the water”*
**Value For Money**9%
*“Which cost me a lot of money”*
**Durability**9%
*“within 5 minutes both of my betta fish died”*
**Functionality-Overall**9%
*“Did not work well”*
**Smell**8%
*“This thing smells like rotten eggs”*
**Size-Overall**8%
*“Bottle was smaller than expected”*
**Breathability**5%
*“from not being able to breath”*
**Color**4%
*“Blue blue blue stained everywhere”*
**Instructions/User Manual/Troubleshooting**4%
*“The instructions were scratched off”*
**Leak-Proof**4%
*“product leaked all over the place”*
### **Top return reasons **
**Functionality-Overall**28%
**Leak-Proof**15%
**Advertised Vs Actual Product**14%
**Value For Money**12%
**Size-Overall**6%
**Defective Material/Parts**3%
**Product Condition**3%
**Smell**3%
**Durability**2%
**Compatibility-Overall**2%
## **Common questions**
- **Is fish medicine for freshwater profitable to sell on Amazon United States?**
- The niche generates $44K/yr across 32 tracked products. 90-day search growth is -16.8%. Flapen's verdict: Skip it (45/100).
- **How competitive is the fish medicine for freshwater niche?**
- 9 brands and 81 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in fish medicine for freshwater?**
- Top complaints mined from reviews: Contamination, Value For Money, Durability. The return rate is 0.9%.
- **When does demand for fish medicine for freshwater peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the fish medicine for freshwater niche?**
- Listings span $4.53–$80.57; the average listing price is $16.46 (sweet spot $15–$100). The average incumbent carries 5,028 reviews — the moat a new listing must climb.
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