Alkalinity Increaser for Hot Tub
FailThe top 5 products take 80% of clicks, so Alkalinity Increaser for Hot Tub is a Fail.
- Flapen Score
- 48 / 100Ranks 6,657 of 8,839 Patio, Lawn & Garden niches · −8 vs the category median of 5648
- Market size
- $500K/yr87K searches / yr
- 90-day growth
- -15.3%search demand this quarter
- Competition
- 80%top-5 click share · 7 brands · 65 sellers
Flapen Score
Alkalinity Increaser for Hot Tub against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Alkalinity Increaser for Hot Tub is stronger. Inside it, weaker.
Market
The Alkalinity Increaser for Hot Tub market on Amazon at a glance
Shoppers on Amazon United States searched for Alkalinity Increaser for Hot Tub 87K times last year and spent an estimated $500K. The top 5 brands take 92% of clicks. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 33.4% of those searches ended in a purchase.
Shoppers searched for this 87K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 33.4% of those searches ended in a purchase. Searches in the last 90 days moved -15.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $500K a year.
- Searches, last 12 months
- 87K
- Growth, 90 days vs prior 90
- -15.3%
- Conversion, latest week
- 33.4%
- Market size, estimated
- $500Ka year
- Peak month
- March1.3× the quietest month
- Top search term
- alkalinity increaser for hot tub37K searches a year
02 · Price
A sale here is worth $17.30.
Listings sell for $17.30 on average, from $7.61 to $38.57. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 2,500 to 3,000 of them. At $17.30 that is $43K to $52K a year per listing.
- Average price
- $17.30inside the $15 to $100 sweet spot
- Price range
- $7.61–$38.57
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 25K–30K
- Units per listing a year
- 2,500–3,000
- Revenue per listing a year
- $43K–$52K
- Returns
- 0.4%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #58 within Cleaning Tools & Chemicals. It carries 2,065 reviews at 4.72 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #58in Cleaning Tools & Chemicals
- Average rating
- 4.72 starsAmazon United States average 4.42 stars
- Average reviews
- 2,065per listing
- Listings tracked
- 11
04 · Newcomers
3 of last year's 3 launches cleared the first-year sales bar.
3 products launched here in the last 12 months. 3 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 97 months on average, so the names here are established.
- Launched, last 12 months
- 3
- Successful launches
- 3Amazon's first-year sales bar
- Average brand age
- 97 months
Products
Top Alkalinity Increaser for Hot Tub 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
SpaGuard Total Alkalinity Increaser 2 lb Single Pack
- Price
- $14.89
- Rating
- 4.8/5
- Reviews
- 3,802
- Age
- 14y ago
HTH Spa 86131 Alkalinity up Spa & Hot Tub Chemical Raises Alkalinity Stabilizes pH Fluctuation 1.25 lbs
- Price
- $7.61
- Rating
- 4.8/5
- Reviews
- 816
- Age
- 4y ago
AquaDoc Total Alkalinity Increaser for Hot Tub - Alkalinity Booster for Spas & Fresh Water pH Balance
- Price
- $22.38
- Rating
- 4.7/5
- Reviews
- 336
- Age
- 4y ago
SpaChoice 2-Pounds Premium Alkalinity Up Alkalinity Increaser for Hot Tub 100% Sodium Bicarbonate Made in USA
- Price
- $11.84
- Rating
- 4.7/5
- Reviews
- 1,757
- Age
- 19y ago
Clorox Pool&Spa Alkalinity Increaser Raises Total Alkalinity in Spa Water Safe for All Spa Types 2 lb (Pack of 1)
- Price
- $11.48
- Rating
- 4.8/5
- Reviews
- 176
- Age
- 1y ago
Trending
estimated 90-day click momentum
AquaDoc Spa Alkalinity Increaser for Hot Tub - 1 LB - Sodium Bicarbonate Granules for Spa Water Balance and pH Stability - Hot Tub Chemicals Made in USA
- Price
- $13.97
- Rating
- 4.6/5
- Reviews
- 6
- Age
- 2mo ago
FROG Target Total Alkalinity Increaser for Hot Tubs and Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 1 Pack
- Price
- $15.07
- Rating
- 4.4/5
- Reviews
- 109
- Age
- 11mo ago
HTH Spa 86131 Alkalinity up Spa & Hot Tub Chemical Raises Alkalinity Stabilizes pH Fluctuation 1.25 lbs
- Price
- $7.61
- Rating
- 4.8/5
- Reviews
- 816
- Age
- 4y ago
SpaGuard Total Alkalinity Increaser 2 lb Pack of 3 Prevents pH Bounce Proven Pool Water Balancer Suitable for Spas and Hot Tubs
- Price
- $38.57
- Rating
- 4.8/5
- Reviews
- 3,802
- Age
- 9y ago
SpaGuard Total Alkalinity Increaser 2 lb Single Pack
- Price
- $14.89
- Rating
- 4.8/5
- Reviews
- 3,802
- Age
- 14y ago
Newest
by launch dateAquaDoc Spa Alkalinity Increaser for Hot Tub - 1 LB - Sodium Bicarbonate Granules for Spa Water Balance and pH Stability - Hot Tub Chemicals Made in USA
- Price
- $13.97
- Rating
- 4.6/5
- Reviews
- 6
- Age
- 2mo ago
AquaDoc Spa Alkalinity Increaser for Hot Tub - 32oz (2 Pack) - Sodium Bicarbonate Granules for Water Balance and Preventing pH Bounce - Made in USA
- Price
- $33.01
- Rating
- 4.9/5
- Reviews
- 45
- Age
- 8mo ago
FROG Target Total Alkalinity Increaser for Hot Tubs and Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 1 Pack
- Price
- $15.07
- Rating
- 4.4/5
- Reviews
- 109
- Age
- 11mo ago
Clorox Pool&Spa Alkalinity Increaser Raises Total Alkalinity in Spa Water Safe for All Spa Types 2 lb (Pack of 1)
- Price
- $11.48
- Rating
- 4.8/5
- Reviews
- 176
- Age
- 1y ago
AquaDoc Total Alkalinity Increaser for Hot Tub - Alkalinity Booster for Spas & Fresh Water pH Balance
- Price
- $22.38
- Rating
- 4.7/5
- Reviews
- 336
- Age
- 4y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 80% of clicks. A locked shelf that new listings rarely crack.
Brands
7 rising
Sellers
65
Est. top-5 brand share
92%
Top 20: 100%
Est. top-5 click share
80%
Top 20: 100%
Open market
4%
- SpaGuard50%
- MAV AquaDoc14%
- HTH12%
- CLOROX Pool&Spa9%
- SpaChoice7%
- FROG4%
- Open — no brand owns it (1 brand, 4%)
Demand
Alkalinity Increaser for Hot Tub search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Alkalinity Increaser for Hot Tub search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- alkalinity increaser for hot tub37K/yr
- spa alkalinity increaser14K/yr
- hot tub alkalinity increaser12K/yr
- total alkalinity increaser for hot tub7K/yr
- leisure time alkalinity increaser4K/yr
- spaguard alkalinity increaser3K/yr
- spaguard total alkalinity increaser2K/yr
- alkalinity up hot tub4K/yr
- alkaline increaser for hot tub3K/yr
- spa guard total alkalinity increaser for hot tub2K/yr
Reviews and returns
What reviews say buyers love and hate about Alkalinity Increaser for Hot Tub
We read the reviews and the return reasons for every product selling here.
“my alkalinity is not even measurable”
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
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Alkalinity Increaser for Hot Tub 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