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API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored
Purchase options and add-ons
- Contains one (1) API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, including 7 bottles of testing solutions, 1 color card and 4 tubes with cap
- Helps monitor water quality and prevent invisible water problems that can be harmful to fish and cause fish loss
- Accurately monitors 5 most vital water parameters levels in freshwater aquariums: pH, high range pH, ammonia, nitrite, nitrate
- Designed for use in freshwater aquariums only
- Use for weekly monitoring and when water or fish problems appear
Customer ratings by feature
Frequently bought together
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Product guides and documents
Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 9.13 x 3.5 x 4.63 inches; 1.15 Pounds
- Item model number : 34
- Department : Unisex-Adult
- Date First Available : June 20, 2004
- Manufacturer : Mars Fishcare
- ASIN : B000255NCI
- Country of Origin : USA
- Best Sellers Rank: #1,476 in Pet Supplies (See Top 100 in Pet Supplies)
- #1 in Pond Test Kits & Thermometers
- #1 in Aquarium Test Kits
- Customer Reviews:
Videos
Videos for this product
3:44
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API Freshwater Master Test Kit Review!
Candid Tech TV
Videos for this product
3:02
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Customer Review: Accurate test that takes around 10 minutes to do
Ryott
Videos for this product
1:56
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Watch me check my aquarium water- this kit is amazing!
Emily Philip
Looking for specific info?
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. |
API QUICK START | API AMMO-LOCK | API pH UP | API pH DOWN | API NITRA-ZORB | API PHOS-ZORB | |
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Customer Reviews |
4.7 out of 5 stars
12,070
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4.6 out of 5 stars
4,831
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4.6 out of 5 stars
611
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4.5 out of 5 stars
1,621
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4.4 out of 5 stars
2,520
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4.5 out of 5 stars
411
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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.
Product Description
Most water problems are invisible to the eye. Quickly measure and modify the six aquarium levels that are most important to the health of your freshwater fish with the API FRESHWATER MASTER TEST KIT. To stay healthy and thrive, fish need properly balanced levels of ammonia, pH, high range pH, nitrite and nitrate. These levels can change rapidly and create harmful conditions when fish waste, uneaten food or other organic matter accumulate, or when untreated water is added. If left uncorrected, all of these can be harmful or even fatal to fish, with consequences such as reduction of oxygen, increase in stress and higher risk of disease. The API FRESHWATER MASTER TEST KIT measures these six parameters with scientific accuracy and provides professional results. It comes with four test tubes, a holding tray and computer calibrated, laminated color card. Just fill the test tubes, add the test drops and compare results to the color card. Then follow the recommendations on the card if action is required.
With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. 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. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.
Important information
Safety Information
Please Read Instructions Before Use
Ingredients
Includes Four Test Tubes, Caps, Computer-Analyzed Laminated Color Charts, Instructions
Directions
Follow the instructional booklet directions for individual testing of each water parameter, and test weekly for best results.
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Price | -29% $35.98$35.98 List: $50.48 | -31% $34.98$34.98 List: $50.48 | $11.99$11.99 | $11.99$11.99 | -13% $12.99$12.99 List: $14.99 | $29.99$29.99 |
Delivery | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 |
Customer Ratings | ||||||
Accuracy | 4.6 | 3.7 | 3.7 | — | 3.1 | 4.2 |
Easy to use | 4.5 | 4.0 | 4.4 | — | 4.0 | 3.8 |
Easy to read | 4.5 | 4.0 | 4.0 | — | 3.9 | — |
Sold By | Amazon.com | Amazon.com | Umlecoa Warehouse | One Way Pet | Kovspo | Pro.Products.LLC |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of use, accuracy, performance, quality and value of the pet supplies. For example, they mention that it's very easy to use with clear instructions, accurate and works well. Some are happy with value, and health. That said, some complain about the leakage.
AI-generated from the text of customer reviews
Customers like the quality of the pet supplies. They mention that it's a very suitable test kit, with glass test tubes and full coverage plastic test. They also say that the tests are pretty good, and the product is a dependable performer. Customers also say it'll last years and is better than strips.
"...This updated version has great test tubes. Previous versions had glass tubes with caps. The waterline was printed on and would eventually rub off...." Read more
"Great product. Clear instructions, easy to use, plenty of tests, great price, packaged nicely; easy to store." Read more
"These are far better then the strips and are more accurate!" Read more
"I have trouble reading a few of the colors sometimes but a good kit overall." Read more
Customers find the pet supplies easy to use with clear instructions. They also say it covers all the bases and provides good explanations on how to use. Customers also mention that most of the tests are easy to do, with the exception of nitrate. They say it's much easier than using paper strips and much more accurate.
"...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..." Read more
"Great value. Covers all the bases. Gives good explanation on how to use. Wish the bottle for pH was a little larger." Read more
"This is a must have for aquarium keeping, very easy to use, versatile, and informative...." Read more
"...They have attached flip caps.It's pretty straightforward and easy to use, just be sure to read the directions...." Read more
Customers like the accuracy of the pet supplies. They say the API Master test kit is the most accurate and gives the quickest results. They also say the tests are accurate and the number of tests is great. Customers also say that the kit is far more accurate than using strips and is cheaper in the long run.
"...seems to be accurate, and provides all the tests the average tank owner would need...." Read more
"...Will always get these kind of things from Amazon. Seems fairly accurate, easy to understand instructions and easy to use." Read more
"These are far better then the strips and are more accurate!" Read more
"...It's a weight of pros and cons between speed, accuracy, and ease of use when it comes between the testing kit or test strips...." Read more
Customers appreciate the value of the pet supplies. They say it's pretty inexpensive, accurate, and saves them money over the strips.
"...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..." Read more
"Great value. Covers all the bases. Gives good explanation on how to use. Wish the bottle for pH was a little larger." Read more
"Great product. Clear instructions, easy to use, plenty of tests, great price, packaged nicely; easy to store." Read more
"...I do believe in giving credit where credit is due and this kit is affordable which is great for those just starting to get into the hobby!..." Read more
Customers like the performance of the pet supplies. They say that it works well, is easy to follow, and provides great results. Some say that the tests work flawlessly and are much cheaper than paper strips. Overall, customers find the product to be a decent and useful product.
"Works as expected. Cheaper than going to your lfs. Will always get these kind of things from Amazon...." Read more
"...While it still performs nicely, I can't attest to how long it'll last verses the glass ones. But!..." Read more
"Works great and gives accurate results as long as you follow instructions exactly" Read more
"...I don't know how accurate it is though but seems to be working well. I'd recommend this!" Read more
Customers like the health of their fish with the test kit. They say it helps increase fish life and increase their quality of life. Customers also say it keeps them on top of things and makes them focus more on their tank. They find the kit easy to use and provides solutions to problem results. Customers say it has saved all of their pets lives.
"...it is amazing for any stage tank and any beginner or expert in the aquarium hobby." Read more
"...They even added tips to increase and lower levels for everything this kit tests for.*..." Read more
"Get it. Get it. Get it. It will save your fish. Help you maintain a routine when it comes to water changes and gravel cleaning...." Read more
"Necessary to maintain any healthy aquarium. I hate the glass vials, though...." Read more
Customers are mixed about the color of the pet supplies. Some mention that there is a nice color-coded chart on the back of the instruction manual that helps them see the true color. They say the colors are easy to read, however, sometimes they don't match exactly. The card to check colors is laminated so it doesn't get wet. However, some customers say the color differences are very subtle, the instructions for reading the colors is quite poor, and the colors get distorted after a while.
"...downside is it can be a little bit labor intensive and the color scale is subjective." Read more
"...The directions are easy the follow and the color comparison chart works great...." Read more
"...The booklet has been cheaply printed and this is very important, as the more you use the kit the more you come to understand that the colors of your..." Read more
"...of the results taking with my iPhone on flash (in review) helped me see the true color. holding them up outside works well...." Read more
Customers are dissatisfied with the leakage of the pet supplies. They mention that the caps sometimes leak while shaking the vials, the lids on the vialls leak slightly while you are shaking them, and the liquid comes out on the sides of the cap.
"...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..." Read more
"...It does leak a tiny bit which is frustrating but it’s the first out of many others I have purchased so can’t be mad." Read more
"...There's no visible breakage, but it leaks water whenever I shake it and tip it upside down...." Read more
"...When I try to add the drops to the test tube, the liquid comes out on the sides of the cap, so I can't get an accurate amount of the chemical into..." Read more
Reviews with images
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Top reviews
Top reviews from the United States
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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.
My only complaint, is the tubes are so fragile. I’ve broken several tubes over the years, even just taking the cap off.
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.
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.
Top reviews from other countries
Buenos resultados
You can perform the following tests with this kit:
- pH - low range
- pH - high range
- Ammonia
- Nitrite
- Nitrate
Comes with easy to follow instructions and colour chart. The most annoying are the test tubes, i always end up breaking them and having to buy spares, i also hate they are push caps and not screw on as you have to keep your thumb on top of the cap when shaking as it tends to leak out otherwise, i also wish the case layout was better as well as it's a bit annoying and fiddly specially the position of the test tubes. I also purchased the API liquid Kh and Gh kit to make it a true master test kit. I think they should be included as standard as this is called a master test kit after all.
Make sure you shake the plastic liquid bottles very well before using, i shake longer than the instructions state to ensure it's mixed well, specially the nitrate bottle as it's very thick formula and prone to giving inaccurate readings simply because the bottle was not shaked enough before using, so take note shake and shake again.
I recommend this kit for any fish keeper whether you are newbie or advanced user, this kit is suitable for most peoples needs. I tend to only test frequently when cycling a tank and for approx 6 months after cycling complete whilst beneficial bacteria still colonizes in the filter, i don't test often from then on as i find observing the tank and fish can give you good indicators of problems, but nonetheless still a great kit to have to hand for as and when needed.
Check readings in natural daylight if possible as can sometimes be hard to judge colour of tested water against colour chart.
Best kit for overall price accuracy and price. Highly recommend.
Tips:
- Check expiry date is well in to the future on case when it arrives as they last ages.
- I find placing the colour chart up against a window with natural daylight (but not direct sunlight) and then placing the tube by the side of the test i'm testing enables me personally to take a better reading.
- Another way some people find easier is to place the colour chart down flat on a surface in a room with natural daylight, then remove cap from test tube and then place the testing tube on top of the colour chart and test they are testing for, then look straight down the test tube and compare colour.
- Some people complain of the colour in the test tube changing over time and not sure which reading was correct, this will happen hence why it's important to follow instructions. If for example you are told to compare the test tube with colour chart after 5 minutes, then ensure you compare after 5 minutes and not for example 10 minutes, as overtime the colour will continue to change and people then get confused which is the correct reading.
- Shake the Nitrate bottles as it's very thick formula and prone to giving people false readings, read the instructions very carefully, a number of people do the Nitrate test wrong and get inconsistent inaccurate readings. You must shake this bottle excessively. I always shake the bottles longer than the instructions state to ensure they've been shaken enough, if you don't shake them enough you can end up with inaccurate false readings.