- Flapen Score
- 47 / 100Ranks 2,474 of 3,978 Pet Supplies niches · −4 vs the category median of 5147
- Market size
- $473K/yr382K searches / yr
- 90-day growth
- -10.7%search demand this quarter
- Competition
- 68%top-5 click share · 11 brands · 18 sellers
Flapen Score
Ato against its category
The dotted line is the Pet Supplies average. Past it, Ato is stronger. Inside it, weaker.
Market
The Ato market on Amazon at a glance
Shoppers on Amazon United States searched for Ato 382K times last year and spent an estimated $473K. The top 5 brands take 79% of clicks. Flapen scores it 47 out of 100, a Fail.
01 · Demand
An estimated 2.1% of those searches ended in a purchase.
Shoppers searched for this 382K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 2.1% of those searches ended in a purchase. Searches in the last 90 days moved -10.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $473K a year.
- Searches, last 12 months
- 382K
- Growth, 90 days vs prior 90
- -10.7%
- Conversion, latest week
- 2.1%
- Market size, estimated
- $473Ka year
- Peak month
- August1.5× the quietest month
- Top search term
- ato236K searches a year
02 · Price
A sale here is worth $57.52.
Listings sell for $57.52 on average, from $10.42 to $244.77. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 250 to 500 of them. At $57.52 that is $14K to $29K a year per listing.
- Average price
- $57.52inside the $15 to $100 sweet spot
- Price range
- $10.42–$244.77
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $14K–$29K
- Returns
- 4.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
88% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 10.3% of listings are out of stock. The average listing ranks #169 within Fish & Aquatic Pets. It carries 321 reviews at 3.91 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 88%
- Prime listings
- 100%
- Out of stock, average day
- 10.3%
- Average rank
- #169in Fish & Aquatic Pets
- Average rating
- 3.91 starsAmazon United States average 4.42 stars
- Average reviews
- 321per listing
- Listings tracked
- 17
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 59 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 59 months
Products
Top Ato 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 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Useek Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue
- Price
- $39.93
- Rating
- 3.9/5
- Reviews
- 768
- Age
- 3y ago

FZONE Aquarium ATO with Controller QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium
- Price
- $57.40
- Rating
- 4.0/5
- Reviews
- 415
- Age
- 3y ago

Auto Top Off System for Saltwater Reef Tank Dual Optical Sensor ATO with Built-in Controller No External Box AI-Powered Leak-Proof Probe Dry-Run Protection NG11
- Price
- $34.98
- Rating
- 4.0/5
- Reviews
- 240
- Age
- 4y ago

FZONE ATO System for Saltwater Aquarium Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green)
- Price
- $39.28
- Rating
- 3.9/5
- Reviews
- 978
- Age
- 4y ago

ATO Auto Top Off System for Aquarium with Intelligent Adaptive Learning Triple Safety & Stronger Magnetic Mount - for Saltwater Freshwater Reef Tank (NG ONE)
- Price
- $30.16
- Rating
- 3.8/5
- Reviews
- 170
- Age
- 2y ago
Trending
estimated 90-day click momentum
hygger Intelligent Auto Top Off System Saltwater Aquarium ATO Water Level Refill Controller Kit for Reef Breeders and Freshwater Tank Supplies
- Price
- $46.24
- Rating
- 2.4/5
- Reviews
- 13
- Age
- 5mo ago

FZONE Aquarium ATO with Controller QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium
- Price
- $57.40
- Rating
- 4.0/5
- Reviews
- 415
- Age
- 3y ago

Auto Top Off System for Saltwater Reef Tank Dual Optical Sensor ATO with Built-in Controller No External Box AI-Powered Leak-Proof Probe Dry-Run Protection NG11
- Price
- $34.98
- Rating
- 4.0/5
- Reviews
- 240
- Age
- 4y ago

Clscea Aquarium Auto Top Off System Water Filler Compensator Blue 1pcs
- Price
- $10.42
- Rating
- 4.2/5
- Reviews
- 339
- Age
- 5y ago

Osmolator 3
- Price
- $244.77
- Rating
- 4.3/5
- Reviews
- 35
- Age
- 2y ago
Newest
by launch date
hygger Intelligent Auto Top Off System Saltwater Aquarium ATO Water Level Refill Controller Kit for Reef Breeders and Freshwater Tank Supplies
- Price
- $46.24
- Rating
- 2.4/5
- Reviews
- 13
- Age
- 5mo ago

Auto Top Off System ATO Saltwater Aquarium Water Top Off System for Aquarium Reef TankFish Tank- Blue
- Price
- $39.65
- Rating
- 4.2/5
- Reviews
- 77
- Age
- 1y ago

Auto Top Off System ATO Saltwater Aquarium Water Top Off System for Aquarium Reef TankFish Tank- Purple
- Price
- $39.81
- Rating
- 4.2/5
- Reviews
- 77
- Age
- 1y ago

MagTool Auto Top Off System for Saltwater Aquarium ATO Aquarium Auto Top Off with Dual Optical Sensor for Reef & Fresh Tanks -Blue
- Price
- $40.26
- Rating
- 4.0/5
- Reviews
- 546
- Age
- 1y ago

MagTool Aquarium Auto Top Off System Upgraded Version Aquarium ATO with Dual Optical Sensor for Both Reef and Fresh Tanks(Duetto V2026)
- Price
- $57.74
- Rating
- 4.0/5
- Reviews
- 177
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 68% of clicks. Leaders hold, but buyers still shop past them.
Brands
11 falling
Sellers
18
Est. top-5 brand share
79%
Top 20: 100%
Est. top-5 click share
68%
Top 20: 100%
Open market
17%
- Useek34%
- FZONE21%
- LAZYBONE AQUA11%
- MagTool7%
- Miofis6%
- Clscea4%
- Open — no brand owns it (5 brands, 17%)
Demand
Ato search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top Ato search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- ato236K/yr
- auto top off32K/yr
- auto top off system saltwater aquarium31K/yr
- aquarium auto top off17K/yr
- ato aquarium top off10K/yr
- aquarium ato10K/yr
- auto top off aquarium13K/yr
- tunze ato4K/yr
- automatic top off for saltwater aquarium4K/yr
- auto top off system4K/yr
Reviews and returns
What reviews say buyers love and hate about Ato
We read the reviews and the return reasons for every product selling here.
“Broke after a couple of months”
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.
17 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 Ato 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









