Aquarium Bacteria
FailThe top 5 brands take 100% of clicks, so Aquarium Bacteria is a Fail.
- Flapen Score
- 37 / 100Ranks 811 of 875 Pet Supplies niches · −13 vs the category median of 5037
- Market size
- £142K/yr94K searches / yr
- 90-day growth
- -24.8%search demand this quarter
- Competition
- 75%top-5 click share · 5 brands · 41 sellers
Flapen Score
Aquarium Bacteria against its category
The dotted line is the Pet Supplies average. Past it, Aquarium Bacteria is stronger. Inside it, weaker.
Market
The Aquarium Bacteria market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Aquarium Bacteria 94K times last year and spent an estimated £142K. All 5 brands take every click. Demand peaks in Feb–Apr–May. Flapen scores it 37 out of 100, a Fail.
01 · Demand
An estimated 15.4% of those searches ended in a purchase.
Shoppers searched for this 94K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 15.4% of those searches ended in a purchase. Searches in the last 90 days moved -24.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated £142K a year.
- Searches, last 12 months
- 94K
- Growth, 90 days vs prior 90
- -24.8%
- Conversion, latest week
- 15.4%
- Market size, estimated
- £142Ka year
- Peak month
- May2.2× the quietest month
- Top search term
- seachem stability27K searches a year
02 · Price
A sale here is worth £9.82.
Listings sell for £9.82 on average, from £2.80 to £32.79. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 500 to 750 of them. At £9.82 that is £5K to £7K a year per listing.
- Average price
- £9.82under the $15 to $100 sweet spot
- Price range
- £2.80–£32.79
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 500–750
- Revenue per listing a year
- £5K–£7K
- Returns
- 0.3%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
85% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.3% of listings are out of stock. The average listing ranks #48 within Fish & Aquatic Pets. It carries 9,245 reviews at 4.67 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 85%
- Prime listings
- 100%
- Out of stock, average day
- 1.3%
- Average rank
- #48in Fish & Aquatic Pets
- Average rating
- 4.67 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 9,245per listing
- Listings tracked
- 13
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 71 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 71 months
Products
Top Aquarium Bacteria 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 29, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Seachem Stability Tank Stabilization System 100 ml
- Price
- £4.48
- Rating
- 4.7/5
- Reviews
- 14,065
- Age
- 16y ago

Seachem Stability Tank Stabilization System 500 ml
- Price
- £16.69
- Rating
- 4.7/5
- Reviews
- 14,065
- Age
- 16y ago

API Quick Start Nitrifying Bacteria for Freshwater and Saltwater Aquariums 118 ml Bottle
- Price
- £7.42
- Rating
- 4.7/5
- Reviews
- 15,282
- Age
- 14y ago

API Quick Start Nitrifying Bacteria for Freshwater and Saltwater Aquariums 473 ml Bottle
- Price
- £15.54
- Rating
- 4.7/5
- Reviews
- 15,282
- Age
- 13y ago

Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria to support biological activity in aquarium extend cleaning intervals & improve filter performance 250ml
- Price
- £6.36
- Rating
- 4.6/5
- Reviews
- 11,880
- Age
- 11y ago
Trending
estimated 90-day click momentum
API Quick Start Nitrifying Bacteria for Freshwater and Saltwater Aquariums 118 ml Bottle
- Price
- £7.42
- Rating
- 4.7/5
- Reviews
- 15,282
- Age
- 14y ago

Seachem Stability Tank Stabilization System 100 ml
- Price
- £4.48
- Rating
- 4.7/5
- Reviews
- 14,065
- Age
- 16y ago

Cleaning Bacteria Aquarium 118 ml - Special Blend Water Care
- Price
- £5.78
- Rating
- 4.6/5
- Reviews
- 3,322
- Age
- 13y ago

Seachem Stability Tank Stabilization System 500 ml
- Price
- £16.69
- Rating
- 4.7/5
- Reviews
- 14,065
- Age
- 16y ago

Starter Bacteria Aquarium 236 ml - Nite-Out II Safe Start & Water Change
- Price
- £6.70
- Rating
- 4.7/5
- Reviews
- 2,675
- Age
- 13y ago
Newest
by launch date
Seachem Stability
- Price
- £32.79
- Rating
- 4.7/5
- Reviews
- 498
- Age
- 6y ago

Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria to support biological activity in aquarium extend cleaning intervals & improve filter performance 250ml
- Price
- £6.36
- Rating
- 4.6/5
- Reviews
- 11,880
- Age
- 11y ago

Fluval Cycle Biological Enhancer 250 ml ( Packaging may vary)
- Price
- £6.47
- Rating
- 4.6/5
- Reviews
- 6,768
- Age
- 12y ago

Cleaning Bacteria Aquarium 118 ml - Special Blend Water Care
- Price
- £5.78
- Rating
- 4.6/5
- Reviews
- 3,322
- Age
- 13y ago

API Quick Start Nitrifying Bacteria for Freshwater and Saltwater Aquariums 30 ml Bottle
- Price
- £2.80
- Rating
- 4.7/5
- Reviews
- 15,282
- Age
- 13y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 75% of clicks. A locked shelf that new listings rarely crack.
Brands
5 falling
Sellers
41
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
75%
Top 20: 100%
Open market
0%
- Seachem54%
- API25%
- Tetra12%
- ARKA6%
- Fluval3%
- Open — no brand owns it (0%)
Demand
Aquarium Bacteria search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Feb, Apr, May · busiest ÷ quietest = 2.2×
Search terms
Top Aquarium Bacteria search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- seachem stability27K/yr
- tetra13K/yr
- api quick start14K/yr
- aquarium bacteria8K/yr
- quick start for fish tank8K/yr
- beneficial bacteria for fish tank4K/yr
- fish tank bacteria4K/yr
- nitrico goop5K/yr
- stability fish water treatment4K/yr
- stability3K/yr
Reviews and returns
What reviews say buyers love and hate about Aquarium Bacteria
We read the reviews and the return reasons for every product selling here.
“Stinks”
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 Aquarium Bacteria 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









