---
title: "Swim Bladder Treatment for Fish — $551K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/swim-bladder-treatment-for-fish"
last_updated: "2026-07-21T17:38:55.344Z"
locale: en
meta:
description: "Niche score 39/100 · $551K/yr market · 225K searches/yr · $11.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $551K/yr market · 225K searches/yr · $11.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Swim Bladder Treatment for Fish — $551K/yr Amazon US Niche (2026) - Flapen"
---
# **swim bladder treatment for fish**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 62Growth 20Conversion 100Competition 4Returns 96Price range 37Avg price 46Brand share 0Review moat 20Quality gap 17
**Conversion**
**Incredible****21.2%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.9%**
return rate — above 6% kills the launch gate
**Market size**
**Good****$551K**
$551K/yr · 225K searches
**Avg price**
**Okay****$11.55**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****$4.08–$21.40**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-9.8%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****13,379.83**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****95%**
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, swim bladder treatment for fish is a $551K/yr Amazon United States market (225K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 39/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **swim bladder treatment for fish market data**
- **Units sold / yr**
- **30K–40K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **$347K–$462K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **21.2%**
- **Avg BSR**
- **#57**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **17%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **88 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products capture 95% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▼falling
**Sellers**
**32**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**95%**
Top 20: 100%
**Open market**
**0%**
- API64% - Tetra22% - Mars Fishcare North Amer8% - Instant Ocean6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -9.8% search growth over the last 90 days.
6K4KPrime Day '25 seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/swim-bladder-treatment-for-fish/trend)
## **Top swim bladder treatment for fish search terms**
- **aquarium salt**144K/yr-10.4%15.0% conv. - **aquarium salt freshwater**31K/yr-4.6%18.5% conv. - **api aquarium salt**14K/yr+6.4%21.0% conv. - **aquarium salt for freshwater tank**12K/yr-28.8%17.0% conv. - **aquarium salt for betta fish**6K/yr-24.0%18.9% conv. - **fish tank salt**4K/yr+3.1%14.2% conv. - **brine shrimp salt**3K/yr-28.0%5.1% conv. - **fish salt**2K/yr-5.0%9.5% conv. - **freshwater aquarium salt**4K/yr-12.7%17.6% conv. - **api salt**2K/yr+40.5%18.3% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/swim-bladder-treatment-for-fish/search-terms)
## **Top swim bladder treatment for fish 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%15%$83K30%$165K45%$248K60%$331K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 6 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box**API**$8.94**4.7★23,796 rev](https://www.amazon.com/dp/B0010P82UO) [2**Tetra Aquarium Salt for Freshwater Fish Tanks 16 Ounces Salt for Tropical and Goldfish Aquariums Enhances the Health of Your Aquatic Pets**Tetra**$4.08**4.8★282 rev](https://www.amazon.com/dp/B0FHL237YC) [3**API AQUARIUM SALT Freshwater Aquarium Salt 17-Ounce Box**API**$8.21**4.7★23,796 rev](https://www.amazon.com/dp/B000255NIC) [4**Aquarium Salt 1 Qt**Mars Fishcare North Amer**$14.14**4.7★185 rev](https://www.amazon.com/dp/B001D711UC) [5**Instant Ocean Sea Salt 50 Gallons For Marine Aquariums Fast Dissolving**Instant Ocean**$21.40**4.8★8,424 rev](https://www.amazon.com/dp/B000255NKA)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Tetra Aquarium Salt for Freshwater Fish Tanks 16 Ounces Salt for Tropical and Goldfish Aquariums Enhances the Health of Your Aquatic Pets**Tetra**$4.08**282 rev1y ago](https://www.amazon.com/dp/B0FHL237YC) [**Aquarium Salt 1 Qt**Mars Fishcare North Amer**$14.14**185 rev14y ago](https://www.amazon.com/dp/B001D711UC) [**API AQUARIUM SALT Freshwater Aquarium Salt 17-Ounce Box**API**$8.21**23,796 rev22y ago](https://www.amazon.com/dp/B000255NIC) [**API AQUARIUM SALT Freshwater Aquarium Salt 67-Ounce Box**API**$12.53**23,796 rev22y ago](https://www.amazon.com/dp/B0010P0ZJK) [**API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box**API**$8.94**23,796 rev22y ago](https://www.amazon.com/dp/B0010P82UO)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Tetra Aquarium Salt for Freshwater Fish Tanks 16 Ounces Salt for Tropical and Goldfish Aquariums Enhances the Health of Your Aquatic Pets**Tetra**$4.08**4.8★**▲ 19%**](https://www.amazon.com/dp/B0FHL237YC) [**API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box**API**$8.94**4.7★**▲ 16%**](https://www.amazon.com/dp/B0010P82UO) [**API AQUARIUM SALT Freshwater Aquarium Salt 17-Ounce Box**API**$8.21**4.7★**▲ 14%**](https://www.amazon.com/dp/B000255NIC) [**Instant Ocean Sea Salt 50 Gallons For Marine Aquariums Fast Dissolving**Instant Ocean**$21.40**4.8★**— 4%**](https://www.amazon.com/dp/B000255NKA) [**Aquarium Salt 1 Qt**Mars Fishcare North Amer**$14.14**4.7★**▼ 16%**](https://www.amazon.com/dp/B001D711UC)
**~~View all trending →~~**
## **What buyers say about swim bladder treatment for fish**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**31%
*“High quality from API”*
**Value For Money**19%
*“budget-friendly”*
**Advertised Vs Actual Product**15%
*“As advertised”*
**Size-Overall**6%
*“Nice size”*
**Pet Friendly**6%
*“Good for fish”*
**Ease Of Use**6%
*“easy-to-use”*
**Water Resistance**3%
*“Great for aquarium”*
**Leak-Proof**3%
*“not was leaking out”*
**Durability**3%
*“Would last me years”*
**Soothing/Teething**3%
*“Calms stressed fish”*
### **What buyers complain about **
**Size-Overall**20%
*“The bag opening is so small that you can barely get a measuring spoon in it”*
**Value For Money**20%
*“1 qt of salt for $12.00 is ridiculous”*
**Moist/Dry**20%
*“Box will get wet”*
**Contamination**20%
*“lost a couple fish”*
**Texture/Consistency-Overall**10%
*“It's a bit granular”*
### **Top return reasons **
**Leak-Proof**40%
**Size-Overall**13%
**Value For Money**12%
**Advertised Vs Actual Product**9%
**Contamination**4%
**Durability**3%
**Defective Material/Parts**3%
**Ingredients-Overall**3%
**Functionality-Overall**3%
**Eco Friendliness**3%
## **Common questions**
- **Is swim bladder treatment for fish profitable to sell on Amazon United States?**
- The niche generates $551K/yr across 6 tracked products. 90-day search growth is -9.8%. Flapen's verdict: Skip it (39/100).
- **How competitive is the swim bladder treatment for fish niche?**
- 4 brands and 32 sellers compete. The top 5 products take 95% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in swim bladder treatment for fish?**
- Top complaints mined from reviews: Size-Overall, Value For Money, Moist/Dry. The return rate is 0.9%.
- **When does demand for swim bladder treatment for fish peak?**
- Demand peaks in Aug–Sep; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the swim bladder treatment for fish niche?**
- Listings span $4.08–$21.40; the average listing price is $11.55 (sweet spot $15–$100). The average incumbent carries 13,380 reviews — the moat a new listing must climb.
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