Overflow Box
FailBuyers convert on only 0.4% of searches, so Overflow Box is a Fail.
- Flapen Score
- 40 / 100Ranks 3,360 of 3,978 Pet Supplies niches · −11 vs the category median of 5140
- Market size
- $35K/yr65K searches / yr
- 90-day growth
- -14.4%search demand this quarter
- Competition
- 48%top-5 click share · 12 brands · 35 sellers
Flapen Score
Overflow Box against its category
The dotted line is the Pet Supplies average. Past it, Overflow Box is stronger. Inside it, weaker.
Market
The Overflow Box market on Amazon at a glance
Shoppers on Amazon United States searched for Overflow Box 65K times last year and spent an estimated $35K. The top 5 brands take 79% of clicks. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 0.4% of those searches ended in a purchase.
Shoppers searched for this 65K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 0.4% of those searches ended in a purchase. Searches in the last 90 days moved -14.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $35K a year.
- Searches, last 12 months
- 65K
- Growth, 90 days vs prior 90
- -14.4%
- Conversion, latest week
- 0.4%
- Market size, estimated
- $35Ka year
- Top search term
- overflow box20K searches a year
02 · Price
A sale here is worth $120.03.
Listings sell for $120.03 on average, from $15.77 to $205.58. Amazon reports units sold in ranges. This niche sold 250 to 500 a year. The average listing sells 0 to 100 of them. At $120.03 that is $0 to $12K a year per listing.
- Average price
- $120.03above the $15 to $100 sweet spot
- Price range
- $15.77–$205.58
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 250–500
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$12K
- Returns
- 7.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
48% of listings pay for placement with sponsored ads. 81% ship with Prime. On an average day, 20.8% of listings are out of stock. The average listing ranks #1,801 within Fish & Aquatic Pets. It carries 103 reviews at 3.97 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 48%
- Prime listings
- 81%
- Out of stock, average day
- 20.8%
- Average rank
- #1,801in Fish & Aquatic Pets
- Average rating
- 3.97 starsAmazon United States average 4.42 stars
- Average reviews
- 103per listing
- Listings tracked
- 21
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 55 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
- 55 months
Products
Top Overflow Box 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
Seapora Nano Overflow Box Black
- Price
- $56.10
- Rating
- 4.0/5
- Reviews
- 88
- Age
- 8y ago

Eshopps AEO11010 Overflow Boxes Pf-1000 for Aquarium Tanks
- Price
- $149.48
- Rating
- 3.9/5
- Reviews
- 64
- Age
- 17y ago

XJHHZHBH Ultra Slim Aquarium Overflow Box for Rimless Tanks No-Drill Silent U-Tube Siphon Dual Inlet Skimmer for Waste & Oil Film 5000 L/H High Flow Fits 1218 inch Aquariums
- Price
- $90.53
- Rating
- 2.5/5
- Reviews
- 3
- Age
- 9mo ago

Aqueon AAG29251 Overflow Accessory New Kit
- Price
- $74.89
- Rating
- 4.5/5
- Reviews
- 290
- Age
- 22y ago

Blue Ocean of 600 Overflow Box Continuous Siphon 125G Aquarium
- Price
- $94.41
- Rating
- 4.3/5
- Reviews
- 186
- Age
- 9y ago
Trending
estimated 90-day click momentum
Seapora 56097 Overflow Pre-Filter
- Price
- $100.74
- Rating
- 3.6/5
- Reviews
- 56
- Age
- 8y ago

Eshopps 62695858: Overflow Box Prodigy L
- Price
- $205.58
- Rating
- 5.0/5
- Reviews
- 3
- Age
- 6y ago

Fiji Cube Low Profile External Overflow Box (800 GPH)
- Price
- $158.29
- Rating
- 4.4/5
- Reviews
- 22
- Age
- 7y ago

Fiji Cube Low Profile External Overflow Box (1200 GPH)
- Price
- $172.80
- Rating
- 3.9/5
- Reviews
- 27
- Age
- 7y ago

XJHHZHBH Ultra Slim Aquarium Overflow Box for Rimless Tanks No-Drill Silent U-Tube Siphon Dual Inlet Skimmer for Waste & Oil Film 5000 L/H High Flow Fits 1218 inch Aquariums
- Price
- $90.53
- Rating
- 2.5/5
- Reviews
- 3
- Age
- 9mo ago
Newest
by launch date
XJHHZHBH Ultra Slim Aquarium Overflow Box for Rimless Tanks No-Drill Silent U-Tube Siphon Dual Inlet Skimmer for Waste & Oil Film 5000 L/H High Flow Fits 1218 inch Aquariums
- Price
- $90.53
- Rating
- 2.5/5
- Reviews
- 3
- Age
- 9mo ago

Overflow Box for Aquariums Overflow Pre Filter Quality Acrylic Self Start Siphon Hang On Overflow Box for Fish Aquarium
- Price
- $131.65
- Rating
- 2.4/5
- Reviews
- 4
- Age
- 2y ago

Acrylic Self Start Siphon Hang On Overflow Box High Light Transmittance Prevents Debris Movable Outlet Cover Check Valve Fish Aquarium
- Price
- $112.81
- Rating
- 4.6/5
- Reviews
- 3
- Age
- 2y ago

Quality Acrylic Self Start Siphon Hang On Overflow Box Super Quiet for Fish Tank Aquarium
- Price
- $123.73
- Rating
- 3.2/5
- Reviews
- 7
- Age
- 5y ago

Eshopps 62695858: Overflow Box Prodigy L
- Price
- $205.58
- Rating
- 5.0/5
- Reviews
- 3
- Age
- 6y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 48% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 falling
Sellers
35
Est. top-5 brand share
79%
Top 20: 100%
Est. top-5 click share
48%
Top 20: 99%
Open market
15%
- ESHOPPS34%
- Seapora17%
- Fiji Cube10%
- XJHHZHBH9%
- Aqueon9%
- Blue Ocean7%
- Open — no brand owns it (6 brands, 15%)
Demand
Overflow Box search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5× · 7 of 12 months tracked
Search terms
Top Overflow Box search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- overflow box20K/yr
- aquarium overflow box16K/yr
- aquarium overflow kit9K/yr
- aquarium overflow8K/yr
- overflow box for aquarium sump7K/yr
- eshopps overflow box4K/yr
Reviews and returns
What reviews say buyers love and hate about Overflow Box
We read the reviews and the return reasons for every product selling here.
“Both bulkheads leak”
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 Overflow Box 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









