I think that this test kit would be a good investment for any freshwater aquarium owner. It is pretty inexpensive ($20 cheaper here than at my local pet store, and certainly more cost effective than buying test strips), seems to be accurate, and provides all the tests the average tank owner would need. The tests are easy to perform and it only takes a few minutes to complete (btw, regarding other reviewers' complaints about how long it took - if you don't have ~5 minutes to spare in your week you probably shouldn't be keeping fish).
I originally bought this kit while doing a fishless cycle and was having serious questions about the accuracy of the dipstick tests I'd bought first. I felt much more comfortable with the results I got using the tube method. With the strips I had a hard time reading the results for nitrites and nitrates, it was much easier with this kit.
I typically only use the nitrate test now to ensure I'm keeping up with my water changes, however I do periodically check the pH, ammonia, and nitrite just to make sure that nothing weird is going on. I'll use a medicine dropper I bought from the dollar store to fill the test tubes and perform all 4 tests at once (depending on the pH of your water, you only need to do either the normal pH or high pH, not both, so 4 tubes is sufficient).
The ammonia and nitrate tests can be a little messy as water can seep around the cap, so I use cling wrap or parafilm, making sure to keep one finger over the open end just in case. It's best to read the test in a brightly lit room under white light; I check it under the fluorescent lights in the kitchen. They're all easy enough to read, and even if you can't find an EXACT match to a color on the chart, you'll get a pretty good idea of what your levels are.
I do wish a hardness test was included, but for the average person it isn't really needed. It can be bought separately anyway, and given how inexpensive the master kit is here on Amazon, you'll still be paying less than if you'd bought the master kit alone at a brick and mortar store.
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API Freshwater Master Test Kit Review!
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Customer Review: Accurate test that takes around 10 minutes to do
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From the manufacturer
Testing the Waters
In order for fish to thrive, water must be similar to that which could be found in their natural environment. Poor water quality can cause fish stress, illness and even loss. Most common water quality parameters are Ammonia, Nitrite, Nitrate, and pH. All may vary over time and all are invisible to the eye which is why it is important to test weekly. Testing aquarium water weekly will aid in keeping your most important water parameters within the proper range for your aquarium. Choose from a wide range of API testing options, such as our popular FRESHWATER MASTER TEST KIT or 5-IN-1 TEST STRIPS, for accurate water evaluation. Regular testing will help you easily determine your aquarium conditions.
Find Your Ideal Testing Style!
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Your API Test OptionsChoose the test method that works best for you. Whether you’re a bit pressed for time, or you prefer to measure your parameters on a more in-depth scale, or you only need to test one or two specific parameters, API has what you need! |
Dip and ReadJust dip a 5-in-1 TEST STRIP in your aquarium, swirl twice, and compare to our color chart for fast and accurate results. |
The Scientific ApproachFor more detailed analysis, use the FRESHWATER MASTER TEST KIT, POND MASTER TEST KIT, SALTWATER MASTER TEST KIT, or REEF MASTER TEST KIT for precise readings of parameters. |
Pick One (or Two)Need to check your phosphate levels? What about ammonia? API offers specific test kits to test many different parameters, from general hardness and copper to pH and nitrate. Grab the one you need for a streamlined approach to testing. |
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| API QUICK START | API AMMO-LOCK | API pH UP | API pH DOWN | API NITRA-ZORB | API PHOS-ZORB | |
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| Price | $17.38 | — | $17.54 | — | — | $14.03 |
| Too much nitrites? | ✓ | ✓ | ||||
| Too much ammonia? | ✓ | ✓ | ✓ | |||
| Inappropriate pH levels? | ✓ | ✓ | ||||
| Too much nitrates? | ✓ | |||||
| Too much phosphates? | ✓ |
Making a Better Underwater World
At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world.
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This Item  API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored |  |  |  |  |  | |
| Price | -29% $35.98 List: $50.48 | -29% $35.98 List: $50.48 | $11.99 | $29.99 | $11.75 | -27% $10.99 List: $14.99 |
| Delivery | Get it Apr 23 - 25 | Get it Apr 23 - 25 | Get it as soon as Wednesday, Apr 24 | Get it as soon as Wednesday, Apr 24 | Get it as soon as Thursday, Apr 25 | Get it as soon as Wednesday, Apr 24 |
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| Easy to read | ||||||
| Sold By | Champion Lighting and Supply Co. | Champion Lighting and Supply Co. | Umlecoa Warehouse | Pro.Products.LLC | One Way Pet | Kovspo |
Reviews with images
Works great!
I use this to test my well water before putting in my betta’s aquarium. Identified that after conditioning the water, the pH runs high so I bought some pH Down.The number of drops needed printed on the front of each bottle, so you don’t have to constantly reference the manual.The test tubes for the water samples are plastic with attached lids. I had an older test kit with glass tubes, so this updated version is safer.Great purchase and super easy to use! The results color chart is on the back of the label so you can flip the label and have ready access to the chart.
Top reviews from the United States
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Reviewed in the United States on April 1, 2024
Style: FreshwaterVerified Purchase
I use this to test my well water before putting in my betta’s aquarium. Identified that after conditioning the water, the pH runs high so I bought some pH Down.
The number of drops needed printed on the front of each bottle, so you don’t have to constantly reference the manual.
The test tubes for the water samples are plastic with attached lids. I had an older test kit with glass tubes, so this updated version is safer.
Great purchase and super easy to use! The results color chart is on the back of the label so you can flip the label and have ready access to the chart.
The number of drops needed printed on the front of each bottle, so you don’t have to constantly reference the manual.
The test tubes for the water samples are plastic with attached lids. I had an older test kit with glass tubes, so this updated version is safer.
Great purchase and super easy to use! The results color chart is on the back of the label so you can flip the label and have ready access to the chart.
Images in this review
Reviewed in the United States on January 13, 2024
This updated version has great test tubes. Previous versions had glass tubes with caps. The waterline was printed on and would eventually rub off. These tubes are plastic with permanent waterline molded in. They have attached flip caps.
It's pretty straightforward and easy to use, just be sure to read the directions. To read the nitrates, for example, prior to adding the the drops from the second bottle, you must shake the bottle for 30 seconds then after adding to the tube, shake that for one minute. Just be sure to read the instruction booklet and you'll be fine.
The kit is long lasting, I usually replace 12 to 18 months.
Style: FreshwaterVerified Purchase
Accurately Know Your Tank's Parameters
Reviewed in the United States on January 13, 2024
I've been keeping freshwater fish for awhile and using the API Master Test Kit. It's far more accurate than the test strip.Reviewed in the United States on January 13, 2024
This updated version has great test tubes. Previous versions had glass tubes with caps. The waterline was printed on and would eventually rub off. These tubes are plastic with permanent waterline molded in. They have attached flip caps.
It's pretty straightforward and easy to use, just be sure to read the directions. To read the nitrates, for example, prior to adding the the drops from the second bottle, you must shake the bottle for 30 seconds then after adding to the tube, shake that for one minute. Just be sure to read the instruction booklet and you'll be fine.
The kit is long lasting, I usually replace 12 to 18 months.
Images in this review
Top reviews from other countries
Wolfden
Great all in one kit
Reviewed in Canada on February 5, 2024Style: FreshwaterVerified Purchase
Eduardo Posadas Núñez
Excelente producto
Reviewed in Mexico on November 12, 2023Style: FreshwaterVerified Purchase
Ritam Biswas
Does what it is meant to do - to perfection!
Reviewed in India on July 18, 2022Style: FreshwaterVerified Purchase
B. A. Harrison
Excellent product - 400 tests!
Reviewed in Australia on February 2, 2024Style: FreshwaterVerified Purchase
MR
Best kit for overall price and good accuracy. Few caveats but still highly recommend.
Reviewed in the United Kingdom on May 29, 2017Style: FreshwaterVerified Purchase
