Is calcium hypochlorite profitable to sell on Amazon United States?

The niche generates $1.2M/yr across 28 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +96.4%. Flapen's verdict: Launch it (67/100).

How competitive is the calcium hypochlorite niche?

12 brands and 90 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 83% of demand.

What do buyers complain about in calcium hypochlorite?

Top complaints mined from reviews: Value For Money, Functionality-Overall, Quality-Overall. The return rate is 0.1%.

When does demand for calcium hypochlorite peak?

Demand peaks in Jun–Sep; the busiest month runs 26.1× the quietest.

What does it cost to enter the calcium hypochlorite niche?

Listings span $4.45–$269.29; the average listing price is $83.15 (sweet spot $15–$100). The average incumbent carries 5,626 reviews — the moat a new listing must climb.

calcium hypochlorite

Launch it

A $1.2M/yr market growing +96.4% this quarter with returns at 0.1% — clears our launch bar.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Growth

Great+96.4%

90-day search growth — must beat 0% to launch

Market size

Great$1.2M

$1.2M/yr · 223K searches

Avg price

Great$83.15

avg listing price — sweet spot $15–$100

Conversion

Good6.6%

search→purchase rate — share of searches ending in a sale

Competition

Good43%

top-5 click share — leaders hold, buyers still browse

Brand share

Okay83%

top-5 brand share — brands hold most of the demand

Price range

Okay$4.45–$269.29

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad5,626.46

avg incumbent reviews — the moat a new listing must climb

Signals High Price

According to Flapen's Amazon United States niche tracking, calcium hypochlorite is a $1.2M/yr Amazon United States market (223K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jun–Sep. Verdict: Launch it — 67/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

calcium hypochlorite market data

Units sold / yr: 13K–15K; avg 250–500/product
Revenue / yr: $1.0M–$1.2M; units × avg price
Conversion rate: 6.6%
Avg BSR: #99
Page quality: 0%
Prime: 43%
Sponsored: 89%
Out of stock: 10.7%
Avg brand age: 75 months
Avg seller age: 141 days

Competition & brand share

The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

Top-5 brand share

83%

Top 20: 100%

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 & seasonality

Weekly Amazon search volume, last 104 weeks — +96.4% search growth over the last 90 days.

Peak months: Jun, Sep · busiest ÷ quietest = 26.1×

Open Trend

Top calcium hypochlorite search terms

calcium hypochlorite71K/yr +19.6%4.0% conv.
cal hypo pool shock33K/yr +288.1%6.4% conv.
calcium hypochlorite pool shock30K/yr +149.6%5.0% conv.
leslies pool shock12K/yr +206.1%4.6% conv.
in the swim pool shock12K/yr +221.9%13.2% conv.
cal hypo10K/yr +250.1%5.2% conv.
cal hypo shock6K/yr +249.9%5.5% conv.
pool shock bulk4K/yr +175.1%4.8% conv.
cal-hypo pool shock4K/yr +278.3%6.4% conv.
pool shock calcium hypochlorite7K/yr -51.9%4.2% conv.

All search terms

Top 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.

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

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$51.234.6★16,150 rev

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$48.094.7★14,239 rev

In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 24 X 1 Pound

In The Swim$100.114.6★16,150 rev

In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria Algae and Microorganisms - 25 Pounds

In The Swim$110.814.6★16,150 rev

HTH 52036R Pool Care Shock Advanced Swimming Pool Chemical - Cal Hypo Formula Prevents Bacteria & Algae Restores Crystal Clear Water - Shock Treatment (6 Pack)

HTH$26.014.7★14,239 rev

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

Leslie's$49.2177 rev

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

Aquatick$88.8437 rev

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

Leslie's$162.6010 rev

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

POOL SHARK$93.9645 rev

1y ago

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$50.811,860 rev

2y ago

What buyers say about calcium hypochlorite

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money35%

“Excellent value”

Quality-Overall21%

“quality is consistent as is the product”

Advertised Vs Actual Product13%

“As described”

Ease Of Use7%

“Easy to use”

Ease Of Cleaning5%

“Cleans pool well”

Water Resistance4%

“keeps the pool water maintained clear”

Durability3%

“It seems durable”

Filtration2%

“Clear pool”

Pureness1%

“Crystal Clear Pool”

Strength1%

“Full strength”

What buyers complain about

Value For Money20%

“Far to expensive”

Functionality-Overall17%

“DID NOT WORK”

Quality-Overall13%

“Poor quality control”

Moist/Dry5%

“Opened the sealed container and had some type of moisture because it was clumpy and still wet”

Smell5%

“I noticed the shock it has no chemical smell”

Filtration5%

“causes filter build up”

Color3%

“not the pure white that it should be”

Leak-Proof3%

“it had leaked out in transit”

Instructions/User Manual/Troubleshooting3%

“Useless Dosage Instructions - Outrageous”

Water Resistance3%

“Doesn't clear water”

Top return reasons

Value For Money26%

Advertised Vs Actual Product19%

Size-Overall13%

Functionality-Overall13%

Leak-Proof7%

Defective Material/Parts3%

Ease Of Use2%

Contamination2%