SKU: 36248790751

API Freshwater Master Test Kit

Sale price$641.25 Regular price$712.50
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Description

API Freshwater Master Test KitAPI Freshwater Master Test Kit API Freshwater Master Test Kit is used to measure the pH, high range pH, ammonia, nitrite, and nitrate levels in freshwater aquariums for accurate water quality monitoring. The API FRESHWATER MASTER TEST KIT measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range pH, ammonia, nitrite, and nitrate. With scientific accuracy for professional results, the reusable

API Freshwater Master Test Kit

API Freshwater Master Test Kit is used to measure the pH, high-range pH, ammonia, nitrite, and nitrate levels in freshwater aquariums for accurate water quality monitoring.

The API® FRESHWATER MASTER TEST KIT measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high-range pH, ammonia, nitrite, and nitrate. With scientific accuracy for professional results, the reusable FRESHWATER MASTER TEST KIT comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy storage. Also includes a step-by-step instruction booklet with a color chart that provides information on how to correct unsafe water conditions.

We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate! 

Sizes

Contains 800 tests and includes 7 test solutions, easy-to-ready instructions, 4 glass test tubes and color chart

FAQ

Why test pH?

pH is the measure of acidity in your water. A pH reading of 7.0 is neutral, a pH higher than 7.0 is alkaline, and a pH lower than this level is acidic. It is important to keep your aquarium at the appropriate pH level to ensure optimal water quality for your specific fish species, as different types of fish require different pH levels for their habitats. API® FRESHWATER MASTER TEST KIT will enable you to test the pH levels in your water as often as needed!

Why test for Ammonia?

Fish continually release ammonia directly into the water through their gills, urine, and solid waste. Uneaten food and other waste also add ammonia to the water. A natural way that your aquarium handles this ammonia is through the biological filter or natural aquarium cycle. However, as with any natural process, imbalances can occur. This is why it’s important to regularly test for the presence of ammonia, which can spike unexpectedly in your aquarium. As soon as it is detected, ammonia should be removed, otherwise, it will damage your fish’s gill membranes and harm their respiration, which can eventually result in fish death. Even small amounts of ammonia stress fish, suppressing their immune systems and increasing the likelihood of disease outbreaks. You can remove ammonia from your tank by performing a partial water change, and by dosing with a solution specifically designed to treat ammonia. Test frequently for high ammonia using API FRESHWATER MASTER TEST KIT.

Why test for Nitrite?

Testing for the presence of toxic nitrite is essential so that if it is detected, steps can be taken to remove it. If left untreated, nitrite in the water will hinder normal fish respiration, eventually leading to fish death. Even small amounts or low levels of nitrite stress fish, suppressing their immune systems and increasing the likelihood of disease, which is why it’s important to test for nitrite using API FRESHWATER MASTER TEST KIT. You can remove nitrite from your tank by performing a partial water change.

What does the FRESHWATER MASTER TEST KIT test for?

The FRESHWATER MASTER TEST KIT measures pH, high range pH, ammonia, nitrite, and nitrate in your freshwater aquarium.

What is included with the FRESHWATER MASTER TEST KIT?

The kit includes seven test solutions, easy-to-read instruction, glass test tubes, and a color chart.

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 36248790751

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4.8 ★★★★★
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C. H.
Bozeman, US
★★★★★ 5
Great value for the price, highly recommend
Color: Dogwood & Calming, Size: Medium
Our dog loves these and chews them down to nothing. They are a great value for the money and the use your dog gets out of them. The size is just right for our doberdor.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
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LC
Dallas, US
★★★★★ 3
Our dog loves it but it wasn’t durable enough to last
Color: Dogwood Jack, Size: Large, Color: Dogwood Jack, Size: Large
Our lab took to it as soon as we gave it to her. Perfect size for our 80 lb yellow lab. However, now that it’s in about 10 days, she’s able to break off chunks from this bone that are dime size or larger, and we have to throw it away
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Reviewed in the United States on May 1, 2026
V
Verified Purchase
Valentine's
Pawtucket, US
★★★★★ 5
My Dogs Love Them!
Color: Dogwood & Calming, Size: Medium
My dogs love these. I have Corgis and a Border Collie. They are aggressive at chewing. These last well and my dogs love them. I've purchased these many times!
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Reviewed in the United States on April 19, 2026
T
Verified Purchase
terlynn4
Whiting, US
★★★★★ 5
Long lasting and safer alternative to sticks
Color: Dogwood & Calming, Size: Medium
These are great, very durable, and have lasted a very long time. Much safer for my dogs than the random sticks they find in the yard. They do get shorter with chewing eventually, but they don't break off in little chunks like I've seen with some nylon chews, and they don't splinter like wood. Medium size works well for both my 16 lb Cavalier and my 60 lb Pyrenees/Golden mix. They're both moderate-to-aggressive chewers, though size obviously affects how much damage they can do. I wish you could buy the hemp chew separately because that one is very much a favorite in my house, so after 2 years and 2 purchases, I have barely any left of the remaining hemp chew, but still 2 of the dogwood chews that neither dog is as interested in anymore. I'd love to buy a couple more of just the hemp one.
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Reviewed in the United States on April 30, 2026
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Verified Purchase
Shannon Brace
Alexandria, US
★★★★★ 5
Your dog will thank you.
Color: Dogwood & Fresh Breath, Size: Large
My dogs loves to chew on these. They make a small mess but not as bad as other chews. They are food for keeping teeth clean.
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Reviewed in the United States on May 31, 2026

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