Cistern Blocks
FailPrices span $1.03–$14.85, mostly outside the sweet spot, so Cistern Blocks is a Fail.
- Flapen Score
- 49 / 100Top 36% of 2,976 Grocery niches · +3 vs the category median of 4649
- Market size
- £57K/yr106K searches / yr
- 90-day growth
- -17.3%search demand this quarter
- Competition
- 48%top-5 click share · 14 brands · 165 sellers
Flapen Score
Cistern Blocks against its category
The dotted line is the Grocery average. Past it, Cistern Blocks is stronger. Inside it, weaker.
Market
The Cistern Blocks market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Cistern Blocks 106K times last year and spent an estimated £57K. The top 5 brands take 79% of clicks. Demand peaks in Jan–Feb–Aug. Flapen scores it 49 out of 100, a Fail.
01 · Demand
8.8% of searches ended in a purchase last week.
Shoppers searched for this 106K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 8.8% of those searches ended in a purchase. Searches in the last 90 days moved -17.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £57K a year.
- Searches, last 12 months
- 106K
- Growth, 90 days vs prior 90
- -17.3%
- Conversion, latest week
- 8.8%
- Market size, estimated
- £57Ka year
- Peak month
- January2.4× the quietest month
- Top search term
- cistern blocks56K searches a year
02 · Price
A sale here is worth £6.16.
Listings sell for £6.16 on average, from £1.03 to £14.85. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 250 to 500 of them. At £6.16 that is £2K to £3K a year per listing.
- Average price
- £6.16under the $15 to $100 sweet spot
- Price range
- £1.03–£14.85
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £2K–£3K
- Returns
- 0.1%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
81% of listings pay for placement with sponsored ads. 85% ship with Prime. On an average day, 7.2% of listings are out of stock. The average listing ranks #120 within Household Cleaners. It carries 2,343 reviews at 4.04 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 81%
- Prime listings
- 85%
- Out of stock, average day
- 7.2%
- Average rank
- #120in Household Cleaners
- Average rating
- 4.04 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 2,343per listing
- Listings tracked
- 26
04 · Newcomers
Amazon counts 0 of last year's 2 launches as successful.
2 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 42 months on average, so the names here are settling in.
- Launched, last 12 months
- 2
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 42 months
Products
Top Cistern Blocks products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 90-day click share
EcoZone Forever Flush 2000 Blue Toilet Blocks Eco Friendly Alternative to Loo Rim Hangers Cistern Capsules Clean & Descale WCs Natural Vegan & Non Toxic Cleaner Recyclable Plastic (Set of 2)
- Price
- £8.78
- Rating
- 4.0/5
- Reviews
- 4,640
- Age
- 9y ago

Bloo 3in1 Lemon Toilet Blocks Toilet Limescale Remover Cistern Block Toilet Cleaner Block with Cleaning and Foaming Action Toilet Fresheners Pack of 4
- Price
- £2.12
- Rating
- 4.4/5
- Reviews
- 4,644
- Age
- 2y ago

Bloo New 3in1 Toilet Blocks Pack of 2 Toilet Limescale Remover Cistern Block Toilet Cleaner Block with Cleaning and Foaming Action Toilet Fresheners - Limescale Prevention
- Price
- £1.44
- Rating
- 4.4/5
- Reviews
- 4,644
- Age
- 3y ago

EcoZone Forever Flush 2000 Purple Toilet Blocks Eco Friendly Alternative to Loo Rim Hangers Cistern Capsules Clean & Descale WCs Natural Vegan & Non Toxic Cleaner Recyclable Plastic (Set of 2)
- Price
- £7.58
- Rating
- 3.3/5
- Reviews
- 1,935
- Age
- 5y ago

Easylife Flush 2000 Toilet Cleaner (Pack of 2) Toilet Freshener Lasts up to 2000 Flushes Works Within 24 Hours Biodegradable and Non-Toxic Bathroom Cleaning Products - Fully Guaranteed
- Price
- £7.83
- Rating
- 3.4/5
- Reviews
- 100
- Age
- 6y ago
Trending
90-day click momentum
by Amazon Toilet Cistern Block - Blue Blue 1 pack
- Price
- £1.03
- Rating
- 4.3/5
- Reviews
- 161
- Age
- 3mo ago

Easylife Flush 2000 Toilet Cleaner (Pack of 2) Toilet Freshener Lasts up to 2000 Flushes Works Within 24 Hours Biodegradable and Non-Toxic Bathroom Cleaning Products - Fully Guaranteed
- Price
- £7.83
- Rating
- 3.4/5
- Reviews
- 100
- Age
- 6y ago

Bloo 3in1 Toilet Blocks Pack of 4 Toilet Limescale Remover Cistern Block Toilet Cleaner Block with Cleaning and Foaming Action Toilet Fresheners Fresh Flowers
- Price
- £3.73
- Rating
- 4.4/5
- Reviews
- 4,644
- Age
- 2y ago

Bloo 3in1 Toilet Blocks Pack of 2 Limescale Remover Cistern Block Cleaner Block with Cleaning and Foaming Action Fresheners Lemon
- Price
- £1.66
- Rating
- 4.4/5
- Reviews
- 4,644
- Age
- 2y ago

24pk x 50g Toilet Blocks for Cisterns Blue Ocean Scent Freshener Tablets Cleaners Powerful Inside Rim and Bowl Cleaning Long-Lasting Fragrance Prevents Limescale and Effectively Fights Odours
- Price
- £7.74
- Rating
- 3.5/5
- Reviews
- 503
- Age
- 5y ago
Newest
by launch date
by Amazon Toilet Cistern Block - Blue Blue 1 pack
- Price
- £1.03
- Rating
- 4.3/5
- Reviews
- 161
- Age
- 3mo ago

Power Bleach Toilet Blocks Cistern Blocks Bleach Toilet Tablets 2 X 6 Pack
- Price
- £6.05
- Rating
- 4.2/5
- Reviews
- 80
- Age
- 1y ago

Upgraded Toilet Blocks for Cisterns 6PCS Triple Effect Toilet Cleaner with 3PCS Toilet Tank Cleaners Tablets with Bleach Toilet Bowl Cleaner Tablets Drop in Tank for Deodorizing & Descaling
- Price
- £7.56
- Rating
- 3.8/5
- Reviews
- 155
- Age
- 1y ago

Sanicare PurpleLoo Toilet Cistern Blocks 24 Blocks 4 x 6 Pack
- Price
- £10.61
- Rating
- 4.2/5
- Reviews
- 15
- Age
- 1y ago

Sanicare PinkLoo Toilet Cistern Blocks 12 Blocks 2 x 6 Pack
- Price
- £7.43
- Rating
- 4.3/5
- Reviews
- 112
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take 48% of clicks. Leaders hold, but buyers still shop past them.
Brands
14 falling
Sellers
165
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
48%
Top 20: 93%
Open market
16%
- Bloo34%
- Ecozone23%
- SOL10%
- easylife lifestyle solutions6%
- by Amazon6%
- Instant Power5%
- Open — no brand owns it (8 brands, 16%)
Demand
Cistern Blocks search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Aug · busiest ÷ quietest = 2.4×
Search terms
Top Cistern Blocks search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- cistern blocks56K/yr
- total toilet 2000 flushes 7 in 116K/yr
- toilet cistern cleaner14K/yr
- total toilet8K/yr
- cistern cleaner6K/yr
- bloo cistern blocks5K/yr
- parazone bleach blocks for toilet cistern1K/yr
Reviews and returns
What reviews say buyers love and hate about Cistern Blocks
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
Didn't even last a month
Doesn't last
eventually broke down
not effective
Didn't work for me
They do not work as expected
Not colour change
Not blue
No colour
A little bit pricey
Not worth it
WASTE OF MONEY
No real scent as far as I can tell
Hardly any smell at all
Absolutely no smell of lavender at all
Love
Money well spent
Great value
Good value for money
They provide effective cleaning
They are quite effective in cleaning toilets
definitely easier to clean
As described
As advertised
Performs as described
Smell clean well
Great smell
Smells fresh
Excellent product
Very good quality
Decent
Return
0.1% Return rate 27% Fixable by listing
not effective
Didn't work for me
They do not work as expected
Not colour change
Not blue
No colour
Didn't even last a month
Doesn't last
eventually broke down
No real scent as far as I can tell
Hardly any smell at all
Absolutely no smell of lavender at all
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 Cistern Blocks questions
Answered from the same tracked data.









