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Black Algae Killer for Pools

Pass

Black 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
68 / 100
Top 9% of 8,839 Patio, Lawn & Garden niches · +12 vs the category median of 56
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.

68Pass
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

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.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 69% of clicks. Leaders hold, but buyers still shop past them.

$0$41K$82K$123K$164K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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.

5K4KSpike '25Prime Day '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

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.

19%of positive reviews mention “Quality-Overall”
42%of negative reviews mention “Functionality-Overall”
0.3%of orders come back
“It never worked”
A buyer, on “Functionality-Overall”42% of negative reviews mention the same topic

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

NegativePositive

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