Calcium Hypochlorite
PassCalcium Hypochlorite scores 67 out of 100, a Pass. Shoppers spend an estimated $1.2M a year here, search demand grew +96.4% this quarter, and an estimated 0.1% of orders come back.
- Flapen Score
- 67 / 100Top 11% of 8,839 Patio, Lawn & Garden niches · +11 vs the category median of 5667
- Market size
- $1.2M/yr223K searches / yr
- 90-day growth
- +96.4%search demand this quarter
- Competition
- 43%top-5 click share · 12 brands · 90 sellers
Flapen Score
Calcium Hypochlorite against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Calcium Hypochlorite is stronger. Inside it, weaker.
Market
The Calcium Hypochlorite market on Amazon at a glance
Shoppers on Amazon United States searched for Calcium Hypochlorite 223K times last year and spent an estimated $1.2M. The top 5 brands take 83% of clicks. Demand peaks in Jun–Sep. Flapen scores it 67 out of 100, a Pass.
01 · Demand
An estimated 6.6% of those searches ended in a purchase.
Shoppers searched for this 223K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 6.6% of those searches ended in a purchase. Searches in the last 90 days moved +96.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $1.2M a year.
- Searches, last 12 months
- 223K
- Growth, 90 days vs prior 90
- +96.4%
- Conversion, latest week
- 6.6%
- Market size, estimated
- $1.2Ma year
- Peak month
- September26.1× the quietest month
- Top search term
- calcium hypochlorite71K searches a year
02 · Price
A sale here is worth $83.15.
Listings sell for $83.15 on average, from $4.45 to $269.29. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 250 to 500 of them. At $83.15 that is $21K to $42K a year per listing.
- Average price
- $83.15inside the $15 to $100 sweet spot
- Price range
- $4.45–$269.29
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $21K–$42K
- Returns
- 0.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
89% of listings pay for placement with sponsored ads. 43% ship with Prime. On an average day, 10.7% of listings are out of stock. The average listing ranks #99 within Cleaning Tools & Chemicals. It carries 5,626 reviews at 4.57 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 89%
- Prime listings
- 43%
- Out of stock, average day
- 10.7%
- Average rank
- #99in Cleaning Tools & Chemicals
- Average rating
- 4.57 starsAmazon United States average 4.42 stars
- Average reviews
- 5,626per listing
- Listings tracked
- 28
04 · Newcomers
2 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 2 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 75 months on average, so the names here are established.
- Launched, last 12 months
- 2
- Successful launches
- 2Amazon's first-year sales bar
- Average brand age
- 75 months
Products
Top Calcium Hypochlorite products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 24, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 12 X 1 Pound
- Price
- $51.23
- Rating
- 4.6/5
- Reviews
- 16,150
- Age
- 16y ago

HTH 52037R Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment 1lb (12 Pack)
- Price
- $48.09
- Rating
- 4.7/5
- Reviews
- 14,239
- Age
- 4y ago

In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 24 X 1 Pound
- Price
- $100.11
- Rating
- 4.6/5
- Reviews
- 16,150
- Age
- 16y ago

In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 25 Pounds
- Price
- $110.81
- Rating
- 4.6/5
- Reviews
- 16,150
- Age
- 15y ago

HTH 52036R Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment (6 Pack)
- Price
- $26.01
- Rating
- 4.7/5
- Reviews
- 14,239
- Age
- 4y ago
Trending
estimated 90-day click momentum
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
- Price
- $59.42
- Rating
- 4.7/5
- Reviews
- 14,239
- Age
- 4y ago

Clorox Pool&Spa Shock Clear for Crystal Clear Swimming Pool Water Swim-ready in 15 minutes Suitable for vinyl pools (12-Pack)
- Price
- $50.81
- Rating
- 4.7/5
- Reviews
- 1,860
- Age
- 2y ago

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
- Price
- $49.21
- Rating
- 4.5/5
- Reviews
- 77
- Age
- 6mo ago

POOL SHARK 68% Calcium Hypochlorite Pool Shock | 25 lb Bucket Chlorine Granules | Pool Shock Treatment for Swimming Pools | Inground & Above Ground Pool Cleaning Fast-Acting Chlorine Shock
- Price
- $93.96
- Rating
- 4.6/5
- Reviews
- 45
- Age
- 1y ago

HTH 52030B Swimming Pool Care Shock Swimming Pool Chlorinator Boosts Chlorine Levels Cal Hypo Formula 13.3oz (Pack of 6)
- Price
- $24.01
- Rating
- 4.8/5
- Reviews
- 4,167
- Age
- 4y ago
Newest
by launch date
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
- Price
- $49.21
- Rating
- 4.5/5
- Reviews
- 77
- Age
- 6mo ago

AquaTick 68% Calcium Hypochlorite Pool Shock for Swimming Pools Chlorine Granules 25 lbs Bucket Pool Chlorine for Inground and Above Ground Pool Treatment Non-Stabilized Shock Treatment
- Price
- $88.84
- Rating
- 4.3/5
- Reviews
- 37
- Age
- 8mo ago

Leslies Leslies Power Powder Plus Cal-Hypo Granular Pool Shock Sanitizer for Crystal Clear Water Fast-Dissolving Eliminates Algae & Bacteria 25 Pounds W8000326
- Price
- $162.60
- Rating
- 4.1/5
- Reviews
- 10
- Age
- 1y ago

POOL SHARK 68% Calcium Hypochlorite Pool Shock | 25 lb Bucket Chlorine Granules | Pool Shock Treatment for Swimming Pools | Inground & Above Ground Pool Cleaning Fast-Acting Chlorine Shock
- Price
- $93.96
- Rating
- 4.6/5
- Reviews
- 45
- Age
- 1y ago

Clorox Pool&Spa Shock Clear for Crystal Clear Swimming Pool Water Swim-ready in 15 minutes Suitable for vinyl pools (12-Pack)
- Price
- $50.81
- Rating
- 4.7/5
- Reviews
- 1,860
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 43% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 falling
Sellers
90
Est. top-5 brand share
83%
Top 20: 100%
Est. top-5 click share
43%
Top 20: 90%
Open market
12%
- In The Swim38%
- HTH20%
- Leslie's10%
- CLOROX Pool&Spa7%
- DryTec7%
- Pyrock Chemical5%
- Open — no brand owns it (6 brands, 12%)
Demand
Calcium Hypochlorite search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jun, Sep · busiest ÷ quietest = 26.1×
Search terms
Top Calcium Hypochlorite search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- calcium hypochlorite71K/yr
- cal hypo pool shock33K/yr
- calcium hypochlorite pool shock30K/yr
- leslies pool shock12K/yr
- in the swim pool shock12K/yr
- cal hypo10K/yr
- cal hypo shock6K/yr
- pool shock bulk4K/yr
- cal-hypo pool shock4K/yr
- pool shock calcium hypochlorite7K/yr
Reviews and returns
What reviews say buyers love and hate about Calcium Hypochlorite
We read the reviews and the return reasons for every product selling here.
“Far to expensive”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Calcium Hypochlorite questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









