Is hot springs spa filters profitable to sell on Amazon United States?

The niche generates $131K/yr across 25 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is +11.8%. Flapen's verdict: Skip it (48/100).

How competitive is the hot springs spa filters niche?

13 brands and 19 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 86% of demand.

What do buyers complain about in hot springs spa filters?

Top complaints mined from reviews: Value For Money, Functionality-Overall, Ease Of Cleaning. The return rate is 1.1%.

When does demand for hot springs spa filters peak?

Demand is steady year-round — the busiest month runs 1.7× the quietest.

What does it cost to enter the hot springs spa filters niche?

Listings span $22.48–$350.75; the average listing price is $71.74 (sweet spot $15–$100). The average incumbent carries 247 reviews — the moat a new listing must climb.

hot springs spa filters

Skip it

Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.

Returns

Great1.1%

return rate — above 5% kills the launch gate

Review moat

Great246.92

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$71.74

avg listing price — sweet spot $15–$100

Conversion

Good7.0%

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

Competition

Okay60%

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

Growth

Okay+11.8%

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

Brand share

Okay86%

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

Market size

Okay$131K

$131K/yr · 26K searches

Price range

Bad$22.48–$350.75

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Signals High Price

According to Flapen's Amazon United States niche tracking, hot springs spa filters is a $131K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 86% of demand. Verdict: Skip it — 48/100.

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

hot springs spa filters market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $179K–$215K; units × avg price
Conversion rate: 7.0%
Avg BSR: #435
Page quality: 0%
Prime: 100%
Sponsored: 84%
Out of stock: 2.3%
Avg brand age: 31 months
Avg seller age: 199 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 rising

Sellers

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

60%

Top 20: 95%

Open market

Hot Spring38%
AmiBron23%
REEPLAR14%
POOLPURE7%
Grefilt5%
TOREAD5%
Open — no brand owns it (7 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.8% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.7×

Open Trend

Top hot springs spa filters search terms

hot springs spa filters12K/yr -1.3%6.2% conv.
hot springs hot tub filters8K/yr +25.1%7.3% conv.
hotsprings hot tub filters4K/yr +13.0%6.6% conv.
tri x filters hot springs2K/yr +24.6%7.7% conv.

All search terms

Top hot springs 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★)

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

Top sellers

by 90-day click share

Hot Spring Watkins Grandee Tri-X Replacement Filter Set of 5-73250

Hot Spring$350.754.6★169 rev

REEPLAR PWK35B Replaces Hot Springs Limelight Spa Filters Compatible with Watkins 1642301-1 78161 78286 Filbur FC-3921 Hot Spring Limelight Series Filter Cartridge 35 sq.ft - 2 Pack

REEPLAR$54.834.6★161 rev

Hot Spring Spas Tri-X Ceramic Cartridge Filter Single 79435 White

Hot Spring$70.174.7★331 rev

AmiBron PWK30 Hot Springs Spa Filters Compatible for Watkins 31489 Unicel C-6430 Filbur FC-3915 P/N0969601 73178 73250 71825 30 sq.ft.Hot Tub Filter 3 Pack

AmiBron$47.864.8★273 rev

Hot Spring Watkins Jetsetter Tri-X Filter Set of 3 73250

Hot Spring$211.784.8★153 rev

Newest

by launch date

DAYEAR SPA Filter Replacement Hot Tub Filter Cartridge 1 Pack for PWK30 C-6430 31489 FC-3915 P/N0969601 71825 73178 73250

DAYEAR$22.4810 rev

6mo ago

AQUIVEX 73178 Hot Springs Tri-x Hot Tub Filter Compatible with Hot Springs Watkins 31489 71825 73178 73250 APC APCC7095 Filbur FC-3915 Pleatco PWK30 Unicel C-6430 4 Pack

AQUIVEX$54.3130 rev

9mo ago

Ying-ti 3-Pack C-6430 Spa Filter Cartridge for Hot Spring & Most 30 sq.ft. Filters Replaces C-6430 31489 PWK30 FC-3915

Ying-ti$34.533 rev

10mo ago

Grefilt 31489 Hot Tub Filter Compatible with Hot Springs Spa Filters PWK30 Unicel C-6430 Filbur FC-3915 71825 73178 73250 P/N0969601 30 sq.ft 3-Pack

Grefilt$43.4366 rev

1y ago

Grefilt PWK30 Hot Tub Filter Compatible with Hot Springs Spa Filters Watkins 31489 Unicel C-6430 Filbur FC-3915 71825 73178 73250 P/N0969601 30 sq.ft. 5-Pack

Grefilt$68.6066 rev

1y ago

What buyers say about hot springs spa filters

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

What buyers love

Filtration23%

“Good filters”

Size-Overall22%

“Exact fit”

Quality-Overall17%

“They are good quality and easy install”

Value For Money12%

“Great Value”

Advertised Vs Actual Product8%

“What I needed”

Ease Of Cleaning4%

“Easy to clean”

Durability3%

“They seem to be very durable”

Assembly/Installation2%

“Installation was easy”

Strength1%

“look to be solidly built”

Heating1%

“Great replacement for my hot spring jetsetter spa”

What buyers complain about

Value For Money23%

“hate the price”

Functionality-Overall9%

“they simply didnt work”

Ease Of Cleaning8%

“After all was done, and kitchen reconnected, I looked at the filter - it was so dirty”

Jamming/Clogging5%

“I suspect that maybe clogged up with silicates”

Heating5%

“wouldnt heat up”

Quality-Overall4%

“questionable quality”

Size-Overall2%

“One of the 3 is a little lose fitting – odd”

Durability2%

“Not sure how they will last”

Strength2%

“flimsy compared to most others”

Top return reasons

Size-Overall71%

Filtration16%

Advertised Vs Actual Product5%

Material Quality2%

Defective Material/Parts2%

Value For Money2%

Quality-Overall1%

Functionality-Overall1%

Maintenance And Repair1%

Compatibility-Overall1%

Common questions

Is hot springs spa filters profitable to sell on Amazon United States?: The niche generates $131K/yr across 25 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is +11.8%. Flapen's verdict: Skip it (48/100).
How competitive is the hot springs spa filters niche?: 13 brands and 19 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in hot springs spa filters?: Top complaints mined from reviews: Value For Money, Functionality-Overall, Ease Of Cleaning. The return rate is 1.1%.
When does demand for hot springs spa filters peak?: Demand is steady year-round — the busiest month runs 1.7× the quietest.
What does it cost to enter the hot springs spa filters niche?: Listings span $22.48–$350.75; the average listing price is $71.74 (sweet spot $15–$100). The average incumbent carries 247 reviews — the moat a new listing must climb.