Is hot tub filter profitable to sell on Amazon United Kingdom?

The niche generates £897K/yr across 22 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is +307.8%. Flapen's verdict: Launch it (67/100).

How competitive is the hot tub filter niche?

14 brands and 46 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in hot tub filter?

Top complaints mined from reviews: Size-Overall, Filtration, Quality-Overall. The return rate is 0.2%.

When does demand for hot tub filter peak?

Demand peaks in May–Jun–Jul–Aug; the busiest month runs 8.6× the quietest.

What does it cost to enter the hot tub filter niche?

Listings span £4.48–£30.30; the average listing price is £15.49 (sweet spot $15–$100). The average incumbent carries 2,184 reviews — the moat a new listing must climb.

hot tub filter

Launch it

A $897K/yr market growing +307.8% this quarter with returns at 0.2% — clears our launch bar.

Growth

Incredible+307.8%

90-day search growth — must beat 0% to launch

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Conversion

Incredible15.9%

search→purchase rate — share of searches ending in a sale

Market size

Great£897K

£897K/yr · 364K searches

Avg price

Great£15.49

avg listing price — sweet spot $15–$100

Price range

Good£4.48–£30.30

cheapest to priciest tracked listing — scored on the share inside $15–$100

Brand share

Okay78%

top-5 brand share — brands hold most of the demand

Review moat

Okay2,184.23

avg incumbent reviews — the moat a new listing must climb

Competition

Okay64%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Signals Trending

According to Flapen's Amazon United Kingdom niche tracking, hot tub filter is a £897K/yr Amazon United Kingdom market (364K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Launch it — 67/100.

Data updated Jul 26, 2026 · scored weekly · How we score niches

hot tub filter market data

Units sold / yr: 50K–60K; avg 1,500–2,000/product
Revenue / yr: £775K–£929K; units × avg price
Conversion rate: 15.9%
Avg BSR: #27
Page quality: 0%
Prime: 82%
Sponsored: 86%
Out of stock: 1.3%
Avg brand age: 43 months
Avg seller age: 183 days

Competition & brand share

The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 falling

Sellers

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

64%

Top 20: 98%

Open market

18%

Mallez21%
Finest-Filters19%
POOLPURE19%
Bestway15%
TOREAD4%
AQUALTRA4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +307.8% search growth over the last 90 days.

Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 8.6×

Open Trend

Top hot tub filter search terms

lazy spa filter94K/yr +558.3%15.6% conv.
hot tub filter109K/yr +166.4%7.8% conv.
lay z spa filter33K/yr +468.6%14.4% conv.
hot tub filters30K/yr +224.8%8.0% conv.
lazy spa filters14K/yr +587.7%12.8% conv.
lazy spa filters for hot tub15K/yr +277.4%14.9% conv.
spa filters for hot tubs13K/yr +280.5%8.6% conv.
hot tub filters replacements8K/yr +226.1%6.2% conv.
layzspa filter8K/yr +432.1%16.8% conv.
lay z spa filters6K/yr +536.2%10.3% conv.

All search terms

Top hot tub filter 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 22 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Mallez Hot Tub Filter Replacement Filter Cartridge for Bestway Filter Size VI for All Lay-Z-Spa Models - Paris Miami Vegas Monaco Palm Spring Cancun Helsinki etc.

Mallez£7.264.5★1,052 rev

Finest-Filters Hot Tub Spa Water Filter Cartridges Compatible For Lay-Z-Spa SaluSpa 90352E Intex Type VI Bestway (6 Pack of Replacement Hot Tub Water Filter Cartridges)

Finest-Filters£13.274.6★360 rev

POOLPURE Type VI Filter Replacement Bestway Filter Cartridge for Lay-Z-Spa Miami Vegas Palm Springs Paris Monaco Coleman SaluSpa 90352E Dimensions: 10.5 cm × 7.9 cm (6PC)

POOLPURE£14.484.7★4,544 rev

Lay-Z-Spa Hot Tub Filter Cartridge VI for All Lay-Z-Spa Models - 1 x Twin Pack (2 Filters)

Bestway£4.484.7★5,164 rev

Bestway Filter Cartridge VI for Lay-Z-Spa White and Blue Pack of 6

Bestway£27.564.7★20,821 rev

Newest

by launch date

Hycago 4PCS Hot Tub Filter Type for Ly-z-spa All Models - Paris Miami Vegas Monaco Palm Spring Cancun Helsinki Size 6 Replacement Filter Cartridge for Bestway Filter Size VI

Hycago£9.8526 rev

4mo ago

Hycago 6PCS Hot Tub Filter Type for Ly-z-spa All Models - Paris Miami Vegas Monaco Palm Spring Cancun Helsinki Size 6 Replacement Filter Cartridge for Bestway Filter Size VI

Hycago£12.8026 rev

4mo ago

KGC 6CH-940 Hot Tub Filter Hot Tub Filters for Pleatco PWW50P3 (1 1/2 SAE Coarse Thread) Unicel 6CH-940 Filbur FC-0359 Waterway 817-0050 03FIL1400 25252-for Viking lazy spa filter 2 Pack

KGC£21.98288 rev

7mo ago

ZENO Hot Tub Filter 3 Pack | Spa Filters for Hot Tub | Replacement Filters for Lazy Spa | Water Filter Cartridges Compatible For Lay-Z-Spa SaluSpa 90352E Intex Type VI Bestway

ZENO£7.8935 rev

10mo ago

AQUALTRA VI Filters Compatible with Lay-Z Spa 90352E 58323E 58323 90427E Hot Tub Filters 6 Pack

AQUALTRA£12.9399 rev

1y ago

What buyers say about hot tub filter

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money27%

“Excellent price”

Quality-Overall22%

“Excellent product”

Filtration19%

“Filter works”

Size-Overall12%

“Fits perfectly”

Advertised Vs Actual Product10%

“Does the job well”

Durability4%

“Quality is excellent and durability is great too; they keep their shape well and stand up perfectly to regular use and chemicals”

Ease Of Cleaning1%

“easy to clean”

Efficiency1%

“They work well with Canadian Spa”

Water Resistance1%

“Clear Water”

Recycle/Reuse1%

“They can be cleaned and reused, if you use a suitable filter cleaner - I regularly reorder these”

What buyers complain about

Size-Overall38%

“A smidgen too small = big problems later”

Filtration28%

“Rubbish filter”

Quality-Overall10%

“Trash”

Material Quality3%

“They feel and look a cheaper filter paper material and have less folds/riffles than the previous orders”

Durability3%

“they do not last as long”

Color3%

“turned a slimy greeny blue”

Ease Of Use2%

“it takes a lot of effort”

Ease Of Cleaning2%

“I have tried to wash them out but still makes no difference”

Jamming/Clogging2%

“This is most concerning for hairs, that can easily clog up impellers and valves and cause irreparable damage to the pump system”

Top return reasons

Size-Overall78%

Filtration10%

Compatibility-Overall4%

Advertised Vs Actual Product2%

Quality-Overall1%

Functionality-Overall1%

Defective Material/Parts1%

Add-Ons/Attachments0%

Color0%

Value For Money0%

Common questions

Is hot tub filter profitable to sell on Amazon United Kingdom?: The niche generates £897K/yr across 22 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is +307.8%. Flapen's verdict: Launch it (67/100).
How competitive is the hot tub filter niche?: 14 brands and 46 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 78% of demand.
What do buyers complain about in hot tub filter?: Top complaints mined from reviews: Size-Overall, Filtration, Quality-Overall. The return rate is 0.2%.
When does demand for hot tub filter peak?: Demand peaks in May–Jun–Jul–Aug; the busiest month runs 8.6× the quietest.
What does it cost to enter the hot tub filter niche?: Listings span £4.48–£30.30; the average listing price is £15.49 (sweet spot $15–$100). The average incumbent carries 2,184 reviews — the moat a new listing must climb.