Black Algae Killer for Pools
PassBlack Algae Killer for Pools scores 68 out of 100, a Pass. Shoppers spend an estimated $411K a year here, search demand grew +309.2% this quarter, and an estimated 0.3% of orders come back.
- Flapen Score
- 68 / 100Top 9% of 8,839 Patio, Lawn & Garden niches · +12 vs the category median of 5668
- Market size
- $411K/yr78K searches / yr
- 90-day growth
- +309.2%search demand this quarter
- Competition
- 69%top-5 click share · 8 brands · 73 sellers
Flapen Score
Black Algae Killer for Pools against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Black Algae Killer for Pools is stronger. Inside it, weaker.
Market
The Black Algae Killer for Pools market on Amazon at a glance
Shoppers on Amazon United States searched for Black Algae Killer for Pools 78K times last year and spent an estimated $411K. The top 5 brands take 89% of clicks. Demand peaks in May–Jun–Jul–Aug–Sep. Flapen scores it 68 out of 100, a Pass.
01 · Demand
An estimated 12.3% of those searches ended in a purchase.
Shoppers searched for this 78K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.3% of those searches ended in a purchase. Searches in the last 90 days moved +309.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated $411K a year.
- Searches, last 12 months
- 78K
- Growth, 90 days vs prior 90
- +309.2%
- Conversion, latest week
- 12.3%
- Market size, estimated
- $411Ka year
- Peak month
- July18.4× the quietest month
- Top search term
- black algae killer for pools40K searches a year
02 · Price
A sale here is worth $42.68.
Listings sell for $42.68 on average, from $14.88 to $74.06. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 500 to 750 of them. At $42.68 that is $21K to $32K a year per listing.
- Average price
- $42.68inside the $15 to $100 sweet spot
- Price range
- $14.88–$74.06
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $21K–$32K
- Returns
- 0.3%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
100% of listings pay for placement with sponsored ads. 85% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #22 within Cleaning Tools & Chemicals. It carries 2,591 reviews at 4.27 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 85%
- Out of stock, average day
- 0.0%
- Average rank
- #22in Cleaning Tools & Chemicals
- Average rating
- 4.27 starsAmazon United States average 4.42 stars
- Average reviews
- 2,591per listing
- Listings tracked
- 13
04 · Newcomers
1 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 107 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 107 months
Products
Top Black Algae Killer for Pools 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
Pool Mate 1-Quart Concentrated Black Algaecide Algaecide for Pool Made in USA
- Price
- $31.42
- Rating
- 4.2/5
- Reviews
- 115
- Age
- 2y ago

In The Swim Black Algaecide Eradicates Black Algae in Swimming Pools - Copper Sulfate Pentahydrate - 1 Quart
- Price
- $24.86
- Rating
- 4.2/5
- Reviews
- 779
- Age
- 15y ago

AquaDoc Copper Pool Algaecide for Swimming Pools - 32 oz - 90 Day Algaecide for Inground & Above Ground Pools - Non-Foaming Non-Staining Formula Reduces Chlorine Demand
- Price
- $29.09
- Rating
- 4.2/5
- Reviews
- 1,291
- Age
- 2y ago

PoolRx Pool Unit #101066 6 Month Algaecide Treats 20k-30k gallons Black
- Price
- $66.31
- Rating
- 4.5/5
- Reviews
- 7,500
- Age
- 16y ago

Clorox Pool&Spa Swimming Pool Algaecide and Clarifier Prevents and Treats Pool Algae Clears Water 128 Fl Oz (Pack of 1)
- Price
- $14.88
- Rating
- 4.5/5
- Reviews
- 15,560
- Age
- 9y ago
Trending
estimated 90-day click momentum
AquaDoc Algae Smash Polyquat 60 Algaecide for Swimming Pools - 32 oz - Non-Foaming Non-Staining Formula to Help Remove and Prevent Algae in Inground and Above Ground Pools - Made in USA
- Price
- $36.68
- Rating
- 4.2/5
- Reviews
- 85
- Age
- 3mo ago

HTH 67244 Swimming Pool Care Algae Guard Ultra - Long Lasting Formula Eliminates & Prevents Green Black and Mustard Algae Fast Acting & Effective Swimming Pool Chemical 32oz
- Price
- $27.99
- Rating
- 4.5/5
- Reviews
- 213
- Age
- 1y ago

In The Swim Black Algaecide Eradicates Black Algae in Swimming Pools - Copper Sulfate Pentahydrate - 1 Quart - 2 Pack
- Price
- $44.92
- Rating
- 4.2/5
- Reviews
- 779
- Age
- 1y ago

AquaDoc Copper Pool Algaecide for Swimming Pools - 32 oz - 90 Day Algaecide for Inground & Above Ground Pools - Non-Foaming Non-Staining Formula Reduces Chlorine Demand
- Price
- $29.09
- Rating
- 4.2/5
- Reviews
- 1,291
- Age
- 2y ago

Pool Mate 1-Quart Concentrated Black Algaecide Algaecide for Pool Made in USA
- Price
- $31.42
- Rating
- 4.2/5
- Reviews
- 115
- Age
- 2y ago
Newest
by launch date
AquaDoc Algae Smash Polyquat 60 Algaecide for Swimming Pools - 32 oz - Non-Foaming Non-Staining Formula to Help Remove and Prevent Algae in Inground and Above Ground Pools - Made in USA
- Price
- $36.68
- Rating
- 4.2/5
- Reviews
- 85
- Age
- 3mo ago

AquaDoc Copper Pool Algaecide for Swimming Pools - 128 oz - 90 Day Algaecide for Inground & Above Ground Pools - Non-Foaming Non-Staining Formula Reduces Chlorine Demand
- Price
- $74.06
- Rating
- 4.2/5
- Reviews
- 1,291
- Age
- 1y ago

AquaDoc Copper Pool Algaecide for Swimming Pools - 64 oz - 90 Day Algaecide for Inground & Above Ground Pools - Non-Foaming Non-Staining Formula Reduces Chlorine Demand
- Price
- $60.42
- Rating
- 4.2/5
- Reviews
- 1,291
- Age
- 1y ago

In The Swim Black Algaecide Eradicates Black Algae in Swimming Pools - Copper Sulfate Pentahydrate - 1 Quart - 2 Pack
- Price
- $44.92
- Rating
- 4.2/5
- Reviews
- 779
- Age
- 1y ago

HTH 67244 Swimming Pool Care Algae Guard Ultra - Long Lasting Formula Eliminates & Prevents Green Black and Mustard Algae Fast Acting & Effective Swimming Pool Chemical 32oz
- Price
- $27.99
- Rating
- 4.5/5
- Reviews
- 213
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 69% of clicks. Leaders hold, but buyers still shop past them.
Brands
8 falling
Sellers
73
Est. top-5 brand share
89%
Top 20: 100%
Est. top-5 click share
69%
Top 20: 100%
Open market
6%
- Pool Mate34%
- MAV AquaDoc24%
- In The Swim20%
- poolrx6%
- CLOROX Pool&Spa6%
- APPLIED BIOCHEMISTS5%
- Open — no brand owns it (2 brands, 6%)
Demand
Black Algae Killer for Pools search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: May, Jun, Jul, Aug, Sep · busiest ÷ quietest = 18.4×
Search terms
Top Black Algae Killer for Pools search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- black algae killer for pools40K/yr
- black algaecide for swimming pool10K/yr
- black algae eliminator3K/yr
- black algaecide5K/yr
- black algae destroyer4K/yr
- black algae killer3K/yr
- pool black algae killer4K/yr
- black algae treatment3K/yr
- black algae2K/yr
- black algae pool treatment3K/yr
Reviews and returns
What reviews say buyers love and hate about Black Algae Killer for Pools
We read the reviews and the return reasons for every product selling here.
“It never worked”
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.
18 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 Black Algae Killer for Pools 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









