mustard algae killer for pools
Launch itA $986K/yr market growing +250.3% this quarter with returns at 0.3% — clears our launch bar.
Growth
Incredible+250.3%90-day search growth — must beat 0% to launch
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Conversion
Incredible17.1%search→purchase rate — share of searches ending in a sale
Avg price
Incredible$32.16avg listing price — sweet spot $15–$100
Price range
Great$9.52–$85.03cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Great$986K$986K/yr · 179K searches
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Review moat
Okay2,631.17avg incumbent reviews — the moat a new listing must climb
Competition
Bad78%top-5 click share — a locked-up shelf
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, mustard algae killer for pools is a $986K/yr Amazon United States market (179K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Launch it — 66/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
mustard algae killer for pools market data
- Units sold / yr
- 30K–40K
- avg 2,500–3,000/product
- Revenue / yr
- $965K–$1.3M
- units × avg price
- Conversion rate
- 17.1%
- Avg BSR
- #57
- Page quality
- 0%
- Prime
- 92%
- Sponsored
- 75%
- Out of stock
- 0.0%
- Avg brand age
- 68 months
- Avg seller age
- 156 days
Competition & brand share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
59
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
0%
- Coral Seas43%
- United Chemical42%
- In The Swim7%
- APPLIED BIOCHEMISTS3%
- CLOROX Pool&Spa3%
- MAV AquaDoc2%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +250.3% search growth over the last 90 days.Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 14.7×
Top mustard algae killer for pools search terms
- yellow out45K/yr
- yellow out pool treatment18K/yr
- mustard algae pool treatment22K/yr
- yellow treat algaecide19K/yr
- yellow algae pool treatment13K/yr
- yellow treat12K/yr
- stop yellow algae pool treatment7K/yr
- yellow treat algaecide for swimming pool3K/yr
- yellow gone for pools5K/yr
- yellow gone4K/yr
Top mustard algae killer for pools 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.
All 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.
Coral Seas$19.504.3★1,958 rev
United Chemicals Yellow Treat Mustard Algaecide for Swimming Pool Super Strength Algae Killer for Mustard & Yellow Algae in Saltwater & Chlorine Above & Inground Pool Treatment | YT2-2LB
United Chemical$24.514.3★2,032 rev
United Chemical Yellow Treat Mustard Algaecide 5 oz
United Chemical$9.524.3★408 rev
United Chemicals YellowTreat Mustard Algaecide for Swimming Pool Super Strength Algae Killer for Mustard & Yellow Algae in Saltwater & Chlorine Above & Inground Pool Treatment | YT2-2LB-C2
United Chemical$41.714.5★1,195 rev
Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 4 lbs.
Coral Seas$30.774.4★2,233 rev
Newest
by launch date
In The Swim Quick Clear Yellow - Turn Your Pool Water from Yellow and Cloudy to Sparkling Blue - 2 Pound
In The Swim$18.4516 rev
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
MAV AquaDoc$29.091,291 rev
United Chemicals Yellow Treat 2 lb - YT-C12 - 4 PACK
United Chemical$85.03157 rev
Clorox Pool&Spa Swimming Pool Algaecide and Clarifier Prevents and Treats Pool Algae Clears Water 128 Fl Oz (Pack of 1)
CLOROX Pool&Spa$14.8815,560 rev
United Chemical Yellow Treat Mustard Algaecide 5 oz
United Chemical$9.52408 rev
Trending
90-day click momentumIn The Swim Quick Clear Yellow - Turn Your Pool Water from Yellow and Cloudy to Sparkling Blue - 2 Pound
In The Swim$18.454.2★
Applied Biochemists Pool 408622A Yellowtrine Swimming Pool Algaecide Cleanser 3 lbs
APPLIED BIOCHEMISTS$34.994.3★
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
MAV AquaDoc$29.094.2★
Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 x 4 Pounds
Coral Seas$56.824.7★
Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.
Coral Seas$19.504.3★
What buyers say about mustard algae killer for pools
What buyers praise and complain about, mined from review topics.What buyers love
“I saw some good reviews”
“Worth it”
“Performed as advertised”
“Highly recommend this cleaner”
“Easy to use”
“this restored my pool to blue and clear again”
“After following the directions, I noticed a significant improvement in water clarity and cleanliness”
“Easy to follow instructions”
“it was very durable”
“for some reason this bottle I got is a light blue color like it should be”
What buyers complain about
“Stopped working”
“this time Amazon had a better sale”
“actually cheaper cuz of quality”
“Deceptive advertisement”
“I finally used an entire jug in one use and the algae looked like fuzz the next day and was worse, not better”
“Did not know this product has a blue tint to it”
“Wont stop the green algee growth if its slightly visible”
“Stained my pool”
“Don't keep clean”
“Water not cleared”
Top return reasons
Common questions
- Is mustard algae killer for pools profitable to sell on Amazon United States?
- The niche generates $986K/yr across 12 tracked products. 90-day search growth is +250.3%. Flapen's verdict: Launch it (66/100).
- How competitive is the mustard algae killer for pools niche?
- 6 brands and 59 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in mustard algae killer for pools?
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.3%.
- When does demand for mustard algae killer for pools peak?
- Demand peaks in May–Jun–Jul–Aug; the busiest month runs 14.7× the quietest.
- What does it cost to enter the mustard algae killer for pools niche?
- Listings span $9.52–$85.03; the average listing price is $32.16 (sweet spot $15–$100). The average incumbent carries 2,631 reviews — the moat a new listing must climb.