Is master spa filters profitable to sell on Amazon United States?

The niche generates $61K/yr across 30 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is +13.1%. Flapen's verdict: Worth a look (53/100).

How competitive is the master spa filters niche?

20 brands and 27 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 68% of demand.

What do buyers complain about in master spa filters?

Top complaints mined from reviews: Size-Overall, Filtration, Material Quality. The return rate is 2.7%.

When does demand for master spa filters peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the master spa filters niche?

Listings span $20.51–$96.04; the average listing price is $41.58 (sweet spot $15–$100). The average incumbent carries 153 reviews — the moat a new listing must climb.

master spa filters

Worth a look

Shows a sweet-spot price point ($41.58 avg), but a small market ($61K/yr) keeps it on the watch list.

Avg price

Incredible$41.58

avg listing price — sweet spot $15–$100

Price range

Incredible$20.51–$96.04

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

Review moat

Great152.77

avg incumbent reviews — the moat a new listing must climb

Competition

Good44%

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

Brand share

Good68%

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

Returns

Good2.7%

return rate — above 5% kills the launch gate

Conversion

Okay3.9%

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

Growth

Okay+13.1%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$61K

$61K/yr · 37K searches

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, master spa filters is a $61K/yr Amazon United States market (37K searches/yr). The top 5 brands hold 68% of demand. Verdict: Worth a look — 53/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

master spa filters market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: $42K–$52K; units × avg price
Conversion rate: 3.9%
Avg BSR: #1,356
Page quality: 0%
Prime: 87%
Sponsored: 93%
Out of stock: 0.6%
Avg brand age: 40 months
Avg seller age: 219 days

Competition & brand share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

20 rising

Sellers

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

44%

Top 20: 92%

Open market

25%

LVJUSEN21%
POOLPURE17%
Cryspool12%
Future Way9%
Chryseos9%
SUNRRA7%

Demand & seasonality

Weekly Amazon search volume, last 85 weeks — +13.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top master spa filters search terms

master spa filters19K/yr +15.9%1.5% conv.
master spa twilight series filters9K/yr +11.8%2.9% conv.
master spa filter4K/yr +35.0%1.7% conv.
pma-r3 x268548 master spa filter4K/yr -6.3%9.1% conv.
master spa filters eco pur1K/yr -19.1%0.0% conv.

All search terms

Top master spa filters 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★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Cryspool 06012 Filter Compatible with 6CH-402 PMA40L-F2M X268543 Master Spas Twilight X268365 X26851 X268514 40 Sq. Ft Spa Filter Cartridge 2 Pack

Cryspool$52.674.6★121 rev

LVJUSEN Spa Filter Replaces PMA-R3 X268548 Master Spa Filter/Nordic Retreat Spa Filter/Pleatco PWW35L/Unicel 4CH-935 Fits Most Clarity Healthy Living Spas-2 Pack

LVJUSEN$43.054.3★103 rev

Future Way PWW35L Hot Tub Filter Replacement for X268548-PMA-R3 Unicel 4CH-935817-4035 Filbur FC-0710Waterway Teleweir 35 SF Replace Pleatco PWW35L Spa Filter SD-01235 PDC580-AFS 35 Sq. Ft

Future Way$27.284.4★130 rev

LVJUSEN PMA40L Spa Filter Replaces Master Spas Filter X268543 PMA40L-F2M Fits Most Twilight Series Spa Compatible with 6CH-402/ FC-0317/ X268365-2 Pack

LVJUSEN$46.804.7★25 rev

SUNRRA PWW35L Hot Tub Filter Replacement Compatible with Master Spa X268548-PMA-R3PWW35L Unicel 4CH-935 Waterway 817-4035 Teleweir 35 SF Replace Pleatco PWW35L SPA Filter Cartridge 35 Sq. Ft

SUNRRA$26.144.8★12 rev

Newest

by launch date

Crocker Sales X268549 Outer White Front Access Master Spas Filter

Crocker Sales$73.672 rev

2mo ago

SpiroPure Replacement for Master Spa X268526 Pleatco PMA15P3 Filbur FC-0002 Master Spa Legacy LW 524 Hot Tub Spa Pool Cartridge

SpiroPure$41.850 rev

8mo ago

SUNRRA PWW35L Hot Tub Filter Replacement Compatible with Master Spa X268548-PMA-R3PWW35L Unicel 4CH-935 Waterway 817-4035 Teleweir 35 SF Replace Pleatco PWW35L SPA Filter Cartridge 35 Sq. Ft

SUNRRA$26.1412 rev

9mo ago

LVJUSEN Spa Filter Replaces PMA-R3 X268548 Master Spa Filter/Nordic Retreat Spa Filter/Pleatco PWW35L/Unicel 4CH-935 Fits Most Clarity Healthy Living Spas-2 Pack

LVJUSEN$43.05103 rev

1y ago

LVJUSEN PMA40L Spa Filter Replaces Master Spas Filter X268543 PMA40L-F2M Fits Most Twilight Series Spa Compatible with 6CH-402/ FC-0317/ X268365-2 Pack

LVJUSEN$46.8025 rev

1y ago

What buyers say about master spa filters

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

What buyers love

Value For Money26%

“Very affordable”

Filtration25%

“Great filters”

Size-Overall18%

“Fits great”

Advertised Vs Actual Product10%

“As advertised”

Quality-Overall8%

“Excellent product”

Durability5%

“These also last a long time if you keep them cleaned”

Assembly/Installation1%

“Easy to install”

Ease Of Cleaning1%

“Makes it easy to change out other filters while washing the others”

Correct Contents1%

“Getting the order right”

Soft Feel1%

“skin feels soft when we get out of our hot tub”

What buyers complain about

Size-Overall39%

“Too big”

Filtration10%

“the filters really suck in the debris”

Material Quality7%

“Very cheap plastic crap”

Advertised Vs Actual Product7%

“Not a replacement for advertised filter”

Spray/Flow4%

“the flow is too restrictive”

Value For Money4%

“More expensive ones I”

Durability4%

“I dont think they last as long as name brand for our jacuzzi”

Heating4%

“Caused my spa to overheat”

Ease Of Cleaning2%

“After about 4 months it wasnt worth cleaning it”

Top return reasons

Size-Overall69%

Filtration14%

Advertised Vs Actual Product11%

Functionality-Overall1%

Value For Money1%

Product Condition1%

Defective Material/Parts1%

Eco Friendliness0%

Connectivity-Overall0%

Mounting0%

Common questions

Is master spa filters profitable to sell on Amazon United States?: The niche generates $61K/yr across 30 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is +13.1%. Flapen's verdict: Worth a look (53/100).
How competitive is the master spa filters niche?: 20 brands and 27 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 68% of demand.
What do buyers complain about in master spa filters?: Top complaints mined from reviews: Size-Overall, Filtration, Material Quality. The return rate is 2.7%.
When does demand for master spa filters peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the master spa filters niche?: Listings span $20.51–$96.04; the average listing price is $41.58 (sweet spot $15–$100). The average incumbent carries 153 reviews — the moat a new listing must climb.