Gallery images7
median images per top listing
Brand video5 of 10
top sellers include a brand-uploaded video
0%
Creator videos2
median creator videos per top listing
A+ Content9 of 10
top sellers use A+ (enhanced brand) content
0%
How Aquarium Hydrometers compares
This category's top sellers vs. the median Pet Supplies category and all benchmarked Amazon categories.
Gallery images
Aquarium Hydrometers
7
Pet Supplies median
6
All Amazon
6
Brand video
Aquarium Hydrometers
5 of 10
Pet Supplies median
7 of 10
All Amazon
7 of 10
Creator videos
Aquarium Hydrometers
2
Pet Supplies median
10
All Amazon
8
A+ Content
Aquarium Hydrometers
9 of 10
Pet Supplies median
9 of 10
All Amazon
9 of 10
What this benchmark means
- A+ Content is table stakes: 9 of 10 top sellers use it. A listing without A+ is visibly behind every leader on the shelf.
- Creator video adoption is early: category leaders carry a median of just 2 creator videos. A steady creator content pipeline is one of the fastest ways to out-content this category's top sellers.
The numbers
| Content benchmark | Top 10 best sellers (August 2026) |
|---|---|
| Gallery imagesMedian image count across top listings | 7 |
| Brand videoShare with a brand-uploaded product video | 5 of 10 listings |
| Creator videosMedian count of Amazon Influencer / creator videos | 2 |
| A+ ContentShare with A+ (enhanced brand) content | 9 of 10 listings |
| Star ratingMedian listing rating | 4.2 stars |
| ReviewsMedian review count | 460 |
Top sellers in Aquarium Hydrometers
The top-ranked listings in this category's benchmark cohort (August 2026 snapshot) — the pages setting the content bar above.
- 1Agriculture Solutions Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Autom…
- 2Coralife Aquarium Fish Tank Deep Six Hydrometer for Measuring Water Salinity PPT and Specific Gravity | Salini…
- 3Salinity Refractometer for Aquarium Seawater Marine Fishkeeping | Salinity Tester 0-100PPT & 1.000-1.070 Salin…
- 4Digital Salinity Meter 3-in-1 Saltwater Tester – Specific Gravity, Salinity & Temperature Pen Hydrometer, High…
- 5AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping, 0-100PPT & 1.000…
Frequently asked questions
- How many images do top Aquarium Hydrometers listings have on Amazon?
- The median top-10 best seller in Amazon's Pet Supplies > Fish & Aquatic Pets > Aquarium Hydrometers category has 7 gallery images (as of August 2026).
- Do best-selling Aquarium Hydrometers products use A+ Content?
- 9 of 10 of the top 10 best sellers in this category use A+ Content on their product pages.
- How much video do top Aquarium Hydrometers listings on Amazon have?
- 5 of 10 top sellers include a brand-uploaded video, and the median listing carries 2 creator (Amazon Influencer) videos.
- What rating do top Aquarium Hydrometers products have on Amazon?
- The median top seller in this category holds a 4.2-star rating across 460 reviews.
Falling behind on Amazon?
Benchmark your digital shelf against top sellers to find the biggest opportunities to increase sales — and the content gaps behind them.
More in Fish & Aquatic Pets
Source: Cohley's Amazon Content Benchmarks, August 2026 snapshot. Benchmarks describe the top 10 best sellers in each category — the leaders, not the average listing. Read the methodology.