API Calcium Saltwater Aquarium Test Kit, 1 count
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Easily and accurately measure calcium levels to maintain a healthy saltwater aquarium with API Calcium Ca Saltwater Aquarium Test Kit. Calcium is one of the most important elements in a reef aquarium. Corals, crustaceans, mollusks and some types of encrusting algae need calcium for skeletal growth. The more calcium these organisms use, the lower the levels, making testing an important part of your maintenance routine. This kit uses the titration method to measure calcium levels as low as 20 mg/L. Just fill a test tube with aquarium water, add a few drops of Calcium Test Solution Bottle #1 and shake until the solutions turns from pink to blue. Then compare your results with the color chart and follow the included recommendations if action needs to be taken. Kit comes with glass test tube, liquid test and color chart. For saltwater tanks only.
Key Benefits- Quickly and efficiently tests saltwater aquariums for calcium levels.
- Easy and accurate—simply compare your results with the color chart and follow the included recommendations.
- Corals, crustaceans, mollusks and some types of encrusting algae need calcium for skeletal growth.
- This kit uses the titration method to measure calcium levels as low as 20 mg/L.
- For use in saltwater aquariums only.
(2) liquid dropper bottles with child-resistant safety caps, easy-to-read instructions with information how to test and how to correct unsafe water conditions, glass test tube with snap-tight cap.
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Item Number94360
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Aquarium TypeSaltwater
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Fish TypeMarine Fish, Marine Invertebrate
Do I need to test calcium parameters in a freshwater aquarium?
No – calcium levels need to be monitored and maintained in reef or marine aquariums, as improper levels can be harmful to corals and crustaceans.
How often should I test my calcium levels?
For best results, test calcium levels with API CALCIUM TEST KIT in your saltwater tank weekly.

Fish Care Made Easier
API is a name you can trust when it comes to taking care of fish. Not only are they passionate about fishkeeping, but they're dedicated to improving the hobby and making it easier to maintain the ideal aquatic environment. From helping the novice set up a new tank to providing state-of-the-art filters for advanced systems, you can rely on API's dedication to quality.


Maintain the Perfect Setup
Fishkeeping is a much easier task with API, because they've taken all the guesswork out of setting up a tank and maintaining it. Their proven treatments include water conditioners and clarifiers, fish medications, pH adjusters, algaecides and quick-start solutions—all designed to keep your aquarium crystal clear and your fish happy and healthy.
Testing Is Key
Once you've started a new aquarium, the only way to keep it in perfect balance is with routine water testing. API gives you all the tools you need to create a nurturing environment for both fish and live plants. Their comprehensive Master Test Kits are tailored to freshwater, saltwater or reef environments, and individual tests for things like pH, ammonia or nitrites leave nothing up to chance.


Clearing the Water
API offers reliable three-step filtration for tanks of all sizes with their FILSTAR XP Canister filters and wide variety of filter media. These powerful filters constantly circulate the water, trapping organic waste and odors, removing harmful ammonia and contaminants, and helping good bacteria to thrive in the tank.
Superior Nutrition
Feeding your aquarium inhabitants, whether they're tropical fish, turtles or newts, is something that can be tricky without the right food. API developed a special diet for every type of fish—one that's highly palatable, which leads to less waste in the tank. And that means less ammonia to cloud the water. For your turtle friends, premium floating pellets and stick treats provide multiple vitamins for a stronger, healthier shell.


About API
Through extensive and continuous research and development, API created quality products for all levels of fishkeeping. As people who are passionate about fish care, they understand the rewards of keeping up a successful aquarium or aquarium. With easy-to-read guides and premium treatments, foods, filters and testing equipment, API helps aquarists establish and maintain an environment where fish can flourish.
Customer Reviews

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3 Reviews
3 Reviews
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accurate and easy
By ali7238 on Jun 26, 2020
Api makes great tests but they need to quality check the caps for the tubes.
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Nice and accurate
By jazzpr1 on Jan 16, 2020
Ran out and needed a replacement I trust it to be accurate
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Great for replacement TEST
By Halfpint63 on Aug 2, 2018 top500Contributor
I really appreciate that I can replace any part of my Saltwater testing kits. I have back up kits but love how accurate this test is and easy to use!