Salinity Tester
MaybeProducts sell for $29.90 on average, inside the sweet spot. But demand is soft, at -1.7% this quarter, so Salinity Tester is a Maybe.
- Flapen Score
- 52 / 100Top 42% of 3,978 Pet Supplies niches · +1 vs the category median of 5152
- Market size
- $207K/yr96K searches / yr
- 90-day growth
- -1.7%search demand this quarter
- Competition
- 71%top-5 click share · 17 brands · 43 sellers
Flapen Score
Salinity Tester against its category
The dotted line is the Pet Supplies average. Past it, Salinity Tester is stronger. Inside it, weaker.
Market
The Salinity Tester market on Amazon at a glance
Shoppers on Amazon United States searched for Salinity Tester 96K times last year and spent an estimated $207K. The top 5 brands take 71% of clicks. Demand peaks in Apr–May–Jun–Jul–Aug. Flapen scores it 52 out of 100, a Maybe.
01 · Demand
An estimated 7.2% of those searches ended in a purchase.
Shoppers searched for this 96K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 7.2% of those searches ended in a purchase. Searches in the last 90 days moved -1.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $207K a year.
- Searches, last 12 months
- 96K
- Growth, 90 days vs prior 90
- -1.7%
- Conversion, latest week
- 7.2%
- Market size, estimated
- $207Ka year
- Peak month
- August2.6× the quietest month
- Top search term
- salinity tester35K searches a year
02 · Price
A sale here is worth $29.90.
Listings sell for $29.90 on average, from $6.95 to $92.61. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At $29.90 that is $7K to $15K a year per listing.
- Average price
- $29.90inside the $15 to $100 sweet spot
- Price range
- $6.95–$92.61
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 6K–8K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $7K–$15K
- Returns
- 3.2%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
83% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 1.4% of listings are out of stock. The average listing ranks #61 within Fish & Aquatic Pets. It carries 901 reviews at 4.13 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 83%
- Prime listings
- 94%
- Out of stock, average day
- 1.4%
- Average rank
- #61in Fish & Aquatic Pets
- Average rating
- 4.13 starsAmazon United States average 4.42 stars
- Average reviews
- 901per listing
- Listings tracked
- 18
04 · Newcomers
2 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 2 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 51 months on average, so the names here are settling in.
- Launched, last 12 months
- 2
- Successful launches
- 2Amazon's first-year sales bar
- Average brand age
- 51 months
Products
Top Salinity Tester 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 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Agriculture Solutions Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation
- Price
- $17.94
- Rating
- 4.6/5
- Reviews
- 4,821
- Age
- 10y ago

Pool Salt Tester & PH Meter Hofun Digital Salinity Meter and PH Tester for Aquarium and Pool Saltwater Water 5 in 1 Salinity PH Temp EC and TDS Meter Aquarium Swimming Pool Hot Tub High Accuracy
- Price
- $36.02
- Rating
- 4.3/5
- Reviews
- 1,898
- Age
- 3y ago

Coralife Aquarium Fish Tank Deep Six Hydrometer For Measuring Water Salinity PPT and Specific Gravity
- Price
- $13.66
- Rating
- 4.1/5
- Reviews
- 1,505
- Age
- 22y ago

Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Tester 0-100PPT & 1.000-1.070 Salinity Hydrometer Slatwater Refractometer with Automatic Temperature Compensation (ATC)
- Price
- $16.25
- Rating
- 4.5/5
- Reviews
- 581
- Age
- 5y ago

Digital Salinity Meter 3-in-1 Saltwater Tester Specific Gravity Salinity & Temperature Pen Hydrometer High Accuracy Water Quality Tester for Aquarium Marine Pool Hydroponics Aquaculture
- Price
- $48.86
- Rating
- 4.1/5
- Reviews
- 91
- Age
- 4y ago
Trending
estimated 90-day click momentum
EZTOCH Pool Salinity pH Tester Hydrogen Water Tester 7 in 1 pH Salt ORP H2 TDS EC Temp Meter for Salt Water Pool Hydrogen TDS PPM Tester for Drinking Water pH EC ORP Meter for Hydroponic Water
- Price
- $38.60
- Rating
- 4.3/5
- Reviews
- 36
- Age
- 5mo ago

Pool Salt Tester & PH Meter - 5-in-1 Digital TDS Meter for Salinity PH Temp and EC 0.01 High Accuracy Swimming Pool Hydroponics Aquarium Hot Tub PPM Meter for Pool Drinking Water Wine Food
- Price
- $29.15
- Rating
- 3.1/5
- Reviews
- 21
- Age
- 6mo ago

ZHIZHOU Marine Hydrometer Reef Fish Tank Aquarium Water Salinity Specific Gravity Test
- Price
- $6.95
- Rating
- 3.6/5
- Reviews
- 6
- Age
- 5y ago

YINMIK Pool Salinity pH Meter pH Salt Reader for Saltwater Pool Hydroponic pH EC Meter pH PPM Tester 5 in 1 pH Salt Conductivity TDS Temp Test Kit Digital pH Tester for Aquarium Aquaponics Koi
- Price
- $14.69
- Rating
- 3.9/5
- Reviews
- 84
- Age
- 1y ago

T TESTRUST Pool Salt Tester - Multifunctional 5 in 1 Salinity PH TDS EC and Temperature Meter Pool Salinity Testing Kit Digital Salinity Tester for Swimming Pool Saltwater Sea Water Aquarium
- Price
- $32.17
- Rating
- 4.4/5
- Reviews
- 244
- Age
- 2y ago
Newest
by launch date
EZTOCH Pool Salinity pH Tester Hydrogen Water Tester 7 in 1 pH Salt ORP H2 TDS EC Temp Meter for Salt Water Pool Hydrogen TDS PPM Tester for Drinking Water pH EC ORP Meter for Hydroponic Water
- Price
- $38.60
- Rating
- 4.3/5
- Reviews
- 36
- Age
- 5mo ago

Pool Salt Tester & PH Meter - 5-in-1 Digital TDS Meter for Salinity PH Temp and EC 0.01 High Accuracy Swimming Pool Hydroponics Aquarium Hot Tub PPM Meter for Pool Drinking Water Wine Food
- Price
- $29.15
- Rating
- 3.1/5
- Reviews
- 21
- Age
- 6mo ago

YINMIK Pool Salinity pH Meter pH Salt Reader for Saltwater Pool Hydroponic pH EC Meter pH PPM Tester 5 in 1 pH Salt Conductivity TDS Temp Test Kit Digital pH Tester for Aquarium Aquaponics Koi
- Price
- $14.69
- Rating
- 3.9/5
- Reviews
- 84
- Age
- 1y ago

WLR Industries Hanna HI98319 Marine Salinity Tester Checker
- Price
- $90.40
- Rating
- 3.8/5
- Reviews
- 46
- Age
- 2y ago

T TESTRUST Pool Salt Tester - Multifunctional 5 in 1 Salinity PH TDS EC and Temperature Meter Pool Salinity Testing Kit Digital Salinity Tester for Swimming Pool Saltwater Sea Water Aquarium
- Price
- $32.17
- Rating
- 4.4/5
- Reviews
- 244
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 71% of clicks. A locked shelf that new listings rarely crack.
Brands
17 rising
Sellers
43
Est. top-5 brand share
71%
Top 20: 100%
Est. top-5 click share
71%
Top 20: 100%
Open market
24%
- Agriculture Solutions25%
- Hofun22%
- Coralife10%
- Hallocool8%
- Anbachi5%
- hygger5%
Demand
Salinity Tester search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May, Jun, Jul, Aug · busiest ÷ quietest = 2.6×
Search terms
Top Salinity Tester search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- salinity tester35K/yr
- salinity tester for saltwater aquarium21K/yr
- salinity meter15K/yr
- hydrometer for saltwater aquarium5K/yr
- saltwater tester3K/yr
- salinometer6K/yr
- salinity3K/yr
- aquarium salinity tester4K/yr
- hydrometer aquarium4K/yr
Reviews and returns
What reviews say buyers love and hate about Salinity Tester
We read the reviews and the return reasons for every product selling here.
“Stopped working after one use”
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.
18 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 Salinity Tester 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









