---
title: "Acid — $1.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/acid"
last_updated: "2026-08-09T10:16:25.779Z"
locale: en
meta:
description: "Niche score 71/100 · $1.9M/yr market · 767K searches/yr · $34.88 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 71/100 · $1.9M/yr market · 767K searches/yr · $34.88 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "Acid — $1.9M/yr Amazon US Niche (2026) - Flapen"
---
# **acid**
**Launch it**
A $1.9M/yr market growing +116.5% this quarter with returns at 0.3% — clears our launch bar.
Market size 94Growth 95Conversion 76Competition 45Returns 99Price range 89Avg price 95Brand share 43Review moat 48Quality gap 27
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Growth**
**Incredible****+116.5%**
90-day search growth — must beat 0% to launch
**Avg price**
**Incredible****$34.88**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$1.9M**
$1.9M/yr · 767K searches
**Price range**
**Great****$9.16–$92.48**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****7.3%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,721.53**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****58%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****79%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United States niche tracking, acid is a $1.9M/yr Amazon United States market (767K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in May–Jun–Jul. Verdict: Launch it — 71/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **acid market data**
- **Units sold / yr**
- **60K–80K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$2.1M–$2.8M**
- units × avg price
- **Conversion rate**
- **7.3%**
- **Avg BSR**
- **#56**
- **Page quality**
- **0%**
- **Prime**
- **47%**
- **Sponsored**
- **89%**
- **Out of stock**
- **0.5%**
- **Avg brand age**
- **79 months**
- **Avg seller age**
- **147 days**
## **Competition & brand share**
The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**84**
**Top-5 brand share**
**79%**
Top 20: 100%
**Top-5 click share**
**58%**
Top 20: 100%
**Open market**
**17%**
- CPDI24% - EZ POOLS19% - HOANK14% - CLOROX Pool&Spa14% - Sunnyside Corporation8% - ACID Magic4% - Open — no brand owns it (6 brands, 17%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +116.5% search growth over the last 90 days.
30K20KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 6.3×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/acid/trend)
## **Top acid search terms**
- **muriatic acid**283K/yr+93.9%4.9% conv. - **muriatic acid for swimming pools**168K/yr+262.0%8.8% conv. - **muriatic acid for pool**47K/yr+193.9%6.6% conv. - **acid**86K/yr+9.6%0.3% conv. - **pool acid**30K/yr+100.0%7.8% conv. - **muriatic acid for pools**14K/yr+235.0%7.1% conv. - **muratic acid**16K/yr+103.7%5.1% conv. - **muriatic acid for shells**12K/yr+227.0%2.4% conv. - **pool acid muriatic 1 gallon**14K/yr+67.5%9.1% conv. - **pool muriatic acid**10K/yr+178.2%7.3% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/acid/search-terms)
## **Top acid 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%5%$97K10%$195K15%$292K20%$390K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**CPDI Champion 4-Pack Acidblue Muriatic Acid for Swimming Pools & Spas 1 Gallon Each - Low-Fume pH Stabilizer & Cleaner for Concrete & Masonry Surfaces Clears Rust & Scale Build-Up**CPDI**$58.19**4.6★839 rev](https://www.amazon.com/dp/B08BRW4YVG) [2**Clorox Pool&Spa Swimming Pool pH Down Lowers pH Protects Against Eye and Skin Irritation 5LB (Pack of 1)**CLOROX Pool&Spa**$9.16**4.7★7,613 rev](https://www.amazon.com/dp/B084GPS6KR) [3**EZ Pools Muriatic Acid for Swimming Pools & Spas Pack of 4 Gallons Lowers pH Muriatic Acid for Pools (HCL) pH Reducer for Water Balancing**EZ POOLS**$84.47**4.8★78 rev](https://www.amazon.com/dp/B0CVDD7CN6) [4**Muriatic Acid for Swimming Pools & Spas Removes Mortar from Bricks - 90% Low-Fume pH Stabilizer & Cleaner for Concrete & Masonry Surfaces Clears Rust & Scale Build-Up - Ready to Use (1 Gallon)**HOANK**$10.92**4.4★10 rev](https://www.amazon.com/dp/B0GYMKPBSR) [5**Sunnyside Corporation 71032 1-Quart Muriatic Acid**Sunnyside Corporation**$16.73**4.7★183 rev](https://www.amazon.com/dp/B002NZUBDG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Muriatic Acid for Swimming Pools - Lower pH for Swimming Pools - Crown Muriatic Acid 1 Gal - Concrete Rust Remover - Hydrochloric Acid for Rust Scale & Stains - Available with Omni Depot Gloves**OMNI DEPOT**$29.88**0 rev1mo ago](https://www.amazon.com/dp/B0H3VB6QGD) [**Muriatic Acid for Swimming Pools & Spas Removes Mortar from Bricks - 90% Low-Fume pH Stabilizer & Cleaner for Concrete & Masonry Surfaces Clears Rust & Scale Build-Up - Ready to Use (1 Gallon)**HOANK**$10.92**10 rev2mo ago](https://www.amazon.com/dp/B0GYMKPBSR) [**(4 Gallons) - Muriatic Acid for Swimming Pools & Spas Removes Mortar from Bricks - 90% Low-Fume pH Stabilizer & Cleaner for Concrete & Masonry Surfaces Clears Rust & Scale Build-Up - Ready to Use**HOANK**$43.98**13 rev3mo ago](https://www.amazon.com/dp/B0GW74H3G8) [**OMNI DEPOT Low Fume Concrete Etcher Klean Strip Green Muriatic Acid Heavy Duty Concrete Brick & Masonry Cleaner for Stains Rust & Etching comes Protective Gloves 1 Gallon**OMNI DEPOT**$31.18**6 rev5mo ago](https://www.amazon.com/dp/B0GPM5PXR4) [**MAV AquaDoc pH Down for Pools - 5lb - Sodium Bisulfate pH Decreaser for Pool & Alkalinity Decreaser - Easy Dissolving Dry Acid Pool Chemicals Made in the USA**MAV AquaDoc**$25.59**117 rev1y ago](https://www.amazon.com/dp/B0DZ6MCKSZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Muriatic Acid for Swimming Pools - Lower pH for Swimming Pools - Crown Muriatic Acid 1 Gal - Concrete Rust Remover - Hydrochloric Acid for Rust Scale & Stains - Available with Omni Depot Gloves**OMNI DEPOT**$29.88**0.0★**▲ 74%**](https://www.amazon.com/dp/B0H3VB6QGD) [**Muriatic Acid for Swimming Pools & Spas Removes Mortar from Bricks - 90% Low-Fume pH Stabilizer & Cleaner for Concrete & Masonry Surfaces Clears Rust & Scale Build-Up - Ready to Use (1 Gallon)**HOANK**$10.92**4.4★**▲ 74%**](https://www.amazon.com/dp/B0GYMKPBSR) [**MAV AquaDoc pH Down for Pools - 5lb - Sodium Bisulfate pH Decreaser for Pool & Alkalinity Decreaser - Easy Dissolving Dry Acid Pool Chemicals Made in the USA**MAV AquaDoc**$25.59**4.5★**▲ 60%**](https://www.amazon.com/dp/B0DZ6MCKSZ) [**OMNI DEPOT Low Fume Concrete Etcher Klean Strip Green Muriatic Acid Heavy Duty Concrete Brick & Masonry Cleaner for Stains Rust & Etching comes Protective Gloves 1 Gallon**OMNI DEPOT**$31.18**4.6★**▲ 59%**](https://www.amazon.com/dp/B0GPM5PXR4) [**HTH Pool Care pH Down Lowers pH Swimming Pool Chemical 5 Lbs**HTH**$12.90**4.7★**▲ 48%**](https://www.amazon.com/dp/B09R82LWY3)
**~~View all trending →~~**
## **What buyers say about acid**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**21%
*“well worth the money”*
**Advertised Vs Actual Product**15%
*“Performed as advertised”*
**Quality-Overall**14%
*“Champion a great product”*
**Ease Of Use**9%
*“Easy to use”*
**Ease Of Cleaning**7%
*“Great for keeping your pool clean”*
**Pureness**6%
*“Great pool clarity now”*
**Efficiency**5%
*“Works great”*
**Water Resistance**4%
*“Really helped with the pool water”*
**Strength**4%
*“Very stable formula”*
**Smell**4%
*“This product has no odor”*
### **What buyers complain about **
**Functionality-Overall**39%
*“Stopped working”*
**Value For Money**18%
*“this time Amazon had a better sale”*
**Quality-Overall**7%
*“Garbage”*
**Advertised Vs Actual Product**4%
*“Falsely advertised”*
**Strength**4%
*“Not very strong honestly”*
**Leak-Proof**4%
*“Unable to use as the bottle leaked and was all over the bag and box”*
**Ease Of Cleaning**4%
*“Don't keep clean”*
**Smell**3%
*“it has no odor”*
**Color**3%
*“Did not know this product has a blue tint to it”*
**Water Resistance**3%
*“Water not cleared”*
### **Top return reasons **
**Leak-Proof**35%
**Functionality-Overall**19%
**Value For Money**16%
**Advertised Vs Actual Product**14%
**Size-Overall**2%
**Contamination**2%
**Defective Material/Parts**2%
**Filtration**2%
**Water Resistance**1%
**Smell**1%
## **Common questions**
- **Is acid profitable to sell on Amazon United States?**
- The niche generates $1.9M/yr across 19 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is +116.5%. Flapen's verdict: Launch it (71/100).
- **How competitive is the acid niche?**
- 12 brands and 84 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 79% of demand.
- **What do buyers complain about in acid?**
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.3%.
- **When does demand for acid peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 6.3× the quietest.
- **What does it cost to enter the acid niche?**
- Listings span $9.16–$92.48; the average listing price is $34.88 (sweet spot $15–$100). The average incumbent carries 1,722 reviews — the moat a new listing must climb.
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