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๐ Keep your saltwater sanctuary thriving โ test smarter, not harder!
The API SALTWATER MASTER TEST KIT offers 550 tests to accurately measure four essential water parametersโhigh range pH, ammonia, nitrite, and nitrateโin saltwater aquariums. Designed for weekly monitoring and quick problem detection, it includes six reagent bottles, four capped test tubes, and a color chart for easy, precise testing. Trusted by professionals and hobbyists alike, this kit helps maintain a safe, healthy environment for marine fish and invertebrates, preventing stress and loss caused by invisible water quality issues.



















| Customer Reviews | 4.6 out of 5 stars 4,667 Reviews |
D**T
Work perfect
Great test kit for my Helloreef salt water aquarium
Z**A
Tried and true even over Hannah
I have all the Hannah checkers and guess what? I still revert back to the easy drop tests. Some of the Hannah checkers are cumbersome and it is easy to just fill the test tube and add applicable drops and shake. Hope they donโt stop making these test kits. Everything is included to use. Very efficient.
B**E
Relief to Use
These are relatively easy to use and accurate. They are the same tests my LFS uses and my tank maintenance person uses. It is a great value for the money and a good accurate test kit for the average aquarium owner. My LFS still does testing once a month to ensure accuracy but this helps to catch anything going south with the tank in between maintenance visits.
B**8
Good for the money, tells you where your water quality is.
Work pretty well, not always the most accurate but if you know basically what you're looking for these work great. They don't always measure traces correctly, but traces don't mean much. Fast easy and gives you a good idea of tank water condition.
M**J
Great product
Greta testing kit. Shows all levels and very accurate.
M**.
A must have if you wanna keep fish water in the correct parameters
Great tool to have on hand fresh water saltwater
A**D
Worked
Worked awesome
C**T
Good buy!
This is a VERY easy testing kit. The chemicals that arrived had an expiration date of 2018 so ample time to use the product. Comes with 4 test tubes, easy color chart for reviewing test results, and a nice (but flimsy) storage box to store everything when it's done. The test instructions are the only thing I would change. The directions are simple enough, just they are in a booklet with several other languages made of plain paper. It works but I can see the book not lasting very long since these are water tests and accidents do happen. I already have a few wet fingerprints in it from getting the water out of my aquarium and browsing through the book. They should be laminated like the color charts, perhaps a card for each test. No big deal but certainly an improvement. I would recommend this to anyone though as it is a bargain and the test kit is great.
B**I
Good product,
Good product,
K**R
Good product
Worth the money spent on it.
A**D
A must have for aquatic maintenance
A must for aquarium and biofloc maintenance. Please mind that this kit is salt water or high ph kit, hence you will receive only high ph testing reagent. If you require low ph testing reagent, then go for fresh water testing kit. Although high range ph testing provide you with results from 7 and higher ph, which is enough to serve the purpose of aquarium and biofloc (since 7-8 ph is necessary to maintain). Overall good product.
D**Y
works great
this is very easy to use
F**A
Vendedor totalmente confiable
Fechas de caducidad aรบn vigentes lo suficiente para poder usar todas las pruebas, sus sellos completos y bien empaquetado, producto original
Trustpilot
4 days ago
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