Unicel C-4950 Spa Filter
MaybeBuyers convert on 20.3% of searches. But shoppers spend an estimated $53K a year here, so Unicel C-4950 Spa Filter is a Maybe.
- Flapen Score
- 53 / 100Ranks 5,174 of 8,839 Patio, Lawn & Garden niches · −3 vs the category median of 5653
- Market size
- $53K/yr8K searches / yr
- 90-day growth
- +33.7%search demand this quarter
- Competition
- 66%top-5 click share · 13 brands · 27 sellers
Flapen Score
Unicel C-4950 Spa Filter against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Unicel C-4950 Spa Filter is stronger. Inside it, weaker.
Market
The Unicel C-4950 Spa Filter market on Amazon at a glance
Shoppers on Amazon United States searched for Unicel C-4950 Spa Filter 8K times last year and spent an estimated $53K. The top 5 brands take 84% of clicks. Demand peaks in May–Jun. Flapen scores it 53 out of 100, a Maybe.
01 · Demand
An estimated 20.3% of those searches ended in a purchase.
Shoppers searched for this 8K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 20.3% of those searches ended in a purchase. Searches in the last 90 days moved +33.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $53K a year.
- Searches, last 12 months
- 8K
- Growth, 90 days vs prior 90
- +33.7%
- Conversion, latest week
- 20.3%
- Market size, estimated
- $53Ka year
- Peak month
- May2.0× the quietest month
- Top search term
- prb50-in hot tub filter4K searches a year
02 · Price
A sale here is worth $34.11.
Listings sell for $34.11 on average, from $18.24 to $65.62. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At $34.11 that is $3K to $9K a year per listing.
- Average price
- $34.11inside the $15 to $100 sweet spot
- Price range
- $18.24–$65.62
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $3K–$9K
- Returns
- 1.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
94% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #283 within Filters & Filter Media. It carries 817 reviews at 4.72 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 94%
- Prime listings
- 94%
- Out of stock, average day
- 0.0%
- Average rank
- #283in Filters & Filter Media
- Average rating
- 4.72 starsAmazon United States average 4.42 stars
- Average reviews
- 817per listing
- Listings tracked
- 17
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 36 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 36 months
Products
Top Unicel C-4950 Spa Filter 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 24, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
POOLPURE PLFPRB50-IN Spa Filter Replaces Pleatco PRB50-IN PRB50IN Unicel C-4950 Filbur FC-2390 Jacuzzi J210/J220/J235/J245/J275 Guardian 413-212-02 373045 5X13 Drop in Hot Tub Filter 1 Pack
- Price
- $24.74
- Rating
- 4.7/5
- Reviews
- 3,790
- Age
- 7y ago

Unicel C-4950 50 Square Foot Media Replacement Pool Hot Tub Spa Filter Cartridge with 212 Pleats
- Price
- $30.86
- Rating
- 4.8/5
- Reviews
- 894
- Age
- 20y ago

TOREAD TRF-4950 Spa Filter Replaces Unicel C-4950 Pleatco PRB50-IN Guardian 413-212-02 Filbur FC-2390 373045 03FIL1600 17-2380 Jacuzzi J210/J220/J235/J245/J275 5X13 Hot Tub Filter 1Pack
- Price
- $20.64
- Rating
- 4.8/5
- Reviews
- 1,100
- Age
- 6y ago

Grefilt C-4950 Hot Tub Filter Compatible with PRB50-IN Hot Tub Filter Filbur FC-2390 J200 Guardian 413-212-02 5X13 Drop in 50 sq.ft 2-Pack
- Price
- $30.75
- Rating
- 4.6/5
- Reviews
- 88
- Age
- 1y ago

POOLPURE PLFPRB50-IN Spa Filter Replaces Pleatco PRB50-IN PRB50IN Unicel C-4950 Filbur FC-2390 Jacuzzi J210/J220/J235/J245/J275 Guardian 413-212-02 373045 5X13 Drop in Hot Tub Filter 2 Pack
- Price
- $47.40
- Rating
- 4.7/5
- Reviews
- 3,790
- Age
- 7y ago
Trending
estimated 90-day click momentum
AQUALTRA Spa Filter Compatible with PRB50-IN C-4950 FC-2390 J200/J210/J220/J235/J245/J275 Guardian 413-212-02 373045 13 5/16 x 5 Drop in Hot Tub Filter 2 Pack (White)
- Price
- $30.81
- Rating
- 4.8/5
- Reviews
- 74
- Age
- 2y ago

Ying-ti 2 Pack PRB50 Spa Filter Replaces Pleatco PRB50-IN Unicel C-4950 Filbur FC-2390 Guardian 413-212-02 Filbur FC-2390 Jacuzzi J210/J220/J235/J245/J275 5X13 Hot Tub Filter
- Price
- $24.24
- Rating
- 4.4/5
- Reviews
- 37
- Age
- 1y ago

KGC PRB50-IN Hot Tub Filter Spa Replaces for PRB50 - Fits Unicel C-4950 Guardian 413-212-02 Filbur FC-2390 Spa Filters for J210/J220/J235/J245/J275 5X13 Drop in Hot Tub Filter 100 sq.ft 2 Pack
- Price
- $33.75
- Rating
- 4.9/5
- Reviews
- 15
- Age
- 6mo ago

FFyan Replacement Spa Filter Compatible with Pleatco PRB50-IN for Unicel C-4950 for Filbur FC-2390 for Guardian 413-212-02 373045 817-50000 3FIL1600 17-2380 2pcs Hot Tub Filter.
- Price
- $23.17
- Rating
- 4.8/5
- Reviews
- 22
- Age
- 2y ago

POOLPURE PLFPRB50-IN Spa Filter Replaces Pleatco PRB50-IN PRB50IN Unicel C-4950 Filbur FC-2390 Jacuzzi J210/J220/J235/J245/J275 Guardian 413-212-02 373045 5X13 Drop in Hot Tub Filter 2 Pack
- Price
- $47.40
- Rating
- 4.7/5
- Reviews
- 3,790
- Age
- 7y ago
Newest
by launch date
KGC PRB50-IN Hot Tub Filter Spa Replaces for PRB50 - Fits Unicel C-4950 Guardian 413-212-02 Filbur FC-2390 Spa Filters for J210/J220/J235/J245/J275 5X13 Drop in Hot Tub Filter 100 sq.ft 2 Pack
- Price
- $33.75
- Rating
- 4.9/5
- Reviews
- 15
- Age
- 6mo ago

Grefilt C-4950 Hot Tub Filter Compatible with PRB50-IN Hot Tub Filter Filbur FC-2390 J200 Guardian 413-212-02 5X13 Drop in 50 sq.ft 2-Pack
- Price
- $30.75
- Rating
- 4.6/5
- Reviews
- 88
- Age
- 1y ago

Ying-ti 2 Pack PRB50 Spa Filter Replaces Pleatco PRB50-IN Unicel C-4950 Filbur FC-2390 Guardian 413-212-02 Filbur FC-2390 Jacuzzi J210/J220/J235/J245/J275 5X13 Hot Tub Filter
- Price
- $24.24
- Rating
- 4.4/5
- Reviews
- 37
- Age
- 1y ago

FFyan Replacement Spa Filter Compatible with Pleatco PRB50-IN for Unicel C-4950 for Filbur FC-2390 for Guardian 413-212-02 373045 817-50000 3FIL1600 17-2380 2pcs Hot Tub Filter.
- Price
- $23.17
- Rating
- 4.8/5
- Reviews
- 22
- Age
- 2y ago

AmiBron C-4950 Spa Filters Replaces For Pleatco PRB50-IN Filbur FC-2390 03FIL1600 373045 Compatible For Jacuzzi J210/J220/J235/J245/J275 50 sq.ft 5X13 Drop in Hot Tub filter 2 Pack
- Price
- $33.13
- Rating
- 4.5/5
- Reviews
- 203
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 66% of clicks. Leaders hold, but buyers still shop past them.
Brands
13 rising
Sellers
27
Est. top-5 brand share
84%
Top 20: 100%
Est. top-5 click share
66%
Top 20: 100%
Open market
13%
- POOLPURE29%
- Unicel23%
- TOREAD17%
- Grefilt8%
- AmiBron7%
- Wowreed3%
- Open — no brand owns it (7 brands, 13%)
Demand
Unicel C-4950 Spa Filter search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: May, Jun · busiest ÷ quietest = 2.0×
Reviews and returns
What reviews say buyers love and hate about Unicel C-4950 Spa Filter
We read the reviews and the return reasons for every product selling here.
“They float around in the filter housing unit, therefore they do not filter adequately”
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.
17 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 Unicel C-4950 Spa Filter 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









