---
title: "Pool Shock 73 Calcium Hypochlorite — $81K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/pool-shock-73-calcium-hypochlorite"
last_updated: "2026-08-10T17:58:22.447Z"
locale: en
meta:
description: "Niche score 60/100 · $81K/yr market · 16K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 60/100 · $81K/yr market · 16K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Pool Shock 73 Calcium Hypochlorite — $81K/yr Amazon US Niche (2026) - Flapen"
---
# **pool shock 73 calcium hypochlorite**
**Worth a look**
Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 20Growth 96Conversion 61Competition 73Returns 100Price range 30Avg price 77Brand share 65Review moat 25Quality gap 27
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Growth**
**Incredible****+130.9%**
90-day search growth — must beat 0% to launch
**Avg price**
**Great****$94.31**
avg listing price — sweet spot $15–$100
**Competition**
**Good****41%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****66%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Good****5.4%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Okay****$26.01–$269.29**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****4,070.1**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$81K**
$81K/yr · 16K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, pool shock 73 calcium hypochlorite is a $81K/yr Amazon United States market (16K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 60/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **pool shock 73 calcium hypochlorite market data**
- **Units sold / yr**
- **1K–1K**
- avg 0–100/product
- **Revenue / yr**
- **$94K–$118K**
- units × avg price
- **Conversion rate**
- **5.4%**
- **Avg BSR**
- **#105**
- **Page quality**
- **0%**
- **Prime**
- **48%**
- **Sponsored**
- **93%**
- **Out of stock**
- **9.9%**
- **Avg brand age**
- **84 months**
- **Avg seller age**
- **142 days**
## **Competition & brand share**
The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**102**
**Top-5 brand share**
**66%**
Top 20: 100%
**Top-5 click share**
**41%**
Top 20: 91%
**Open market**
**34%**
- CLOROX Pool&Spa12% - EZ POOLS12% - HTH12% - Rx Clear10% - Doheny's10% - In The Swim10%
## **Demand**
Weekly Amazon search volume, last 12 weeks — +130.9% search growth over the last 90 days.
500300Spike '26May '26May '26May '26Jun '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/pool-shock-73-calcium-hypochlorite/trend)
## **Top pool shock 73 calcium hypochlorite search terms**
- **pool shock 24 pack**9K/yr+122.0%6.7% conv. - **pool shock 73 calcium hypochlorite**4K/yr+161.2%1.7% conv. - **pool shock 73% calcium hypochlorite**3K/yr+114.2%5.5% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/pool-shock-73-calcium-hypochlorite/search-terms)
## **Top pool shock 73 calcium hypochlorite 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%$3K8%$6K12%$10K16%$13K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Super Shockwave Pool Shock 73% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 25 Pounds**EZ POOLS**$138.10**4.6★306 rev](https://www.amazon.com/dp/B0CWZ6NG43) [2**Dohenys Super Pool Shock | Pro-Grade Chlorine Shock Quick-Dissolving Fast-Acting 68% Cal-Hypo Granular Pool Shock | 24 x 1lb Bags Proudly Made in the USA**Doheny's**$102.95**4.7★3,171 rev](https://www.amazon.com/dp/B0051BI6UE) [3**Pool Essentials Shock Treatment Clears Cloudy Water Fast-Dissolving 24-Pack Granular**Pool Essentials**$92.63**4.6★83 rev](https://www.amazon.com/dp/B0GLRBPTWB) [4**Clorox Pool&Spa Shock XTRABLUE Plus Kills Bacteria & Algae in Swimming Pools Swim-Ready in 15 Minutes (12-Pack) Granular**CLOROX Pool&Spa**$58.62**4.8★4,776 rev](https://www.amazon.com/dp/B0BQCMQ8NW) [5**HTH 52037R Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment 1lb (12 Pack)**HTH**$48.09**4.7★14,239 rev](https://www.amazon.com/dp/B09R82X1S5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HTH 52065 Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment 1lb Packs (24 Packs)**HTH**$86.45**14,239 rev1mo ago](https://www.amazon.com/dp/B0H534L18X) [**Cal Hypo Granule Pool Shock Fast-Dissolving Chlorine Shock Treatment for Swimming Pools Powerful Pool Water Clarifier & Sanitizer for Inground & Above Ground Pools 1 lb Bag (24 Pack)**Pyrock Chemical**$80.15**60 rev4mo ago](https://www.amazon.com/dp/B0GS8TWTWV) [**Pool Essentials Shock Treatment Clears Cloudy Water Fast-Dissolving 24-Pack Granular**Pool Essentials**$92.63**83 rev5mo ago](https://www.amazon.com/dp/B0GLRBPTWB) [**Leslies Leslies Power Powder Plus 73% Cal-Hypo Granular Pool Shock Sanitizer for Crystal Clear Water Fast-Dissolving Eliminates Algae & Bacteria 6 x 1 Pound Bags 25273**Leslie's**$49.21**77 rev6mo ago](https://www.amazon.com/dp/B0GFFYW7BD) [**Pro-Grade Chlorine Pool Shock 68% Cal-Hypo Granular Sanitizer Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment Swimming Pool Chemical - 24 X 1lb**POOLACC**$84.71**165 rev1y ago](https://www.amazon.com/dp/B0FCCCKC7C)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HTH 52065 Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment 1lb Packs (24 Packs)**HTH**$86.45**4.7★**▲ 132%**](https://www.amazon.com/dp/B0H534L18X) [**HTH 52046 Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment 1lb (15 Pack) + 15 HTH Pool Care Test Strips**HTH**$59.42**4.7★**▲ 130%**](https://www.amazon.com/dp/B0B5JZ3XFV) [**Cal Hypo Granule Pool Shock Fast-Dissolving Chlorine Shock Treatment for Swimming Pools Powerful Pool Water Clarifier & Sanitizer for Inground & Above Ground Pools 1 lb Bag (24 Pack)**Pyrock Chemical**$80.15**4.4★**▲ 121%**](https://www.amazon.com/dp/B0GS8TWTWV) [**Clorox Pool&Spa Shock Clear for Crystal Clear Swimming Pool Water Swim-ready in 15 minutes Suitable for vinyl pools (12-Pack)**CLOROX Pool&Spa**$50.81**4.7★**▲ 76%**](https://www.amazon.com/dp/B0CY2VPGDB) [**In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 12 X 1 Pound**In The Swim**$51.23**4.6★**▲ 68%**](https://www.amazon.com/dp/B002WKQ3IE)
**~~View all trending →~~**
## **What buyers say about pool shock 73 calcium hypochlorite**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**36%
*“Great Value”*
**Quality-Overall**21%
*“Reliable products”*
**Advertised Vs Actual Product**13%
*“As advertised”*
**Ease Of Use**7%
*“Easy to use”*
**Ease Of Cleaning**4%
*“Always keeps my pool clear and clean”*
**Water Resistance**3%
*“keeps water clear”*
**Durability**3%
*“It seems durable”*
**Pureness**2%
*“Crystal Clear Pool”*
**Filtration**2%
*“Clear pool”*
**Size-Overall**1%
*“Great Fit”*
### **What buyers complain about **
**Value For Money**20%
*“It's a little expensive”*
**Quality-Overall**16%
*“Poor quality control”*
**Functionality-Overall**14%
*“still not very effective”*
**Leak-Proof**5%
*“They were leaking product as I was putting it in the pool”*
**Moist/Dry**5%
*“Opened the sealed container and had some type of moisture because it was clumpy and still wet”*
**Smell**5%
*“it had a very strong smell”*
**Filtration**4%
*“causes filter build up”*
**Water Resistance**4%
*“Unfortunately a lot of dirty water got in the pool when taking the cover off. gross”*
**Color**3%
*“not the pure white that it should be”*
**Ease Of Use**2%
*“It is a very bad user experience”*
### **Top return reasons **
**Value For Money**25%
**Advertised Vs Actual Product**20%
**Functionality-Overall**18%
**Leak-Proof**10%
**Size-Overall**6%
**Defective Material/Parts**4%
**Contamination**3%
**Smell**2%
**Filtration**2%
**Water Resistance**2%
## **Common questions**
- **Is pool shock 73 calcium hypochlorite profitable to sell on Amazon United States?**
- The niche generates $81K/yr across 29 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is +130.9%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the pool shock 73 calcium hypochlorite niche?**
- 16 brands and 102 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 66% of demand.
- **What do buyers complain about in pool shock 73 calcium hypochlorite?**
- Top complaints mined from reviews: Value For Money, Quality-Overall, Functionality-Overall. The return rate is 0.1%.
- **What does it cost to enter the pool shock 73 calcium hypochlorite niche?**
- Listings span $26.01–$269.29; the average listing price is $94.31 (sweet spot $15–$100). The average incumbent carries 4,070 reviews — the moat a new listing must climb.
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