API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit
Original price was: $11.88.$11.00Current price is: $11.00.
Price: $11.88 - $11.00
(as of Oct 11, 2025 13:40:10 UTC – Details)
Keep your fish healthy and thriving by testing your aquarium water’s NO3 levels regularly with this easy-to-use API NITRATE TEST KIT for freshwater and saltwater aquariums. Testing water parameters weekly helps prevent invisible water problems that can be harmful to fish. When left uncorrected, high nitrate in aquarium water can lead to a build-up of organic pollutants and poor fish health. Testing is fast, easy, and accurate. The API NITRATE TEST KIT for freshwater and saltwater aquariums tests for harmful nitrate levels from 0-160 ppm. This product comes with one nitrate bottle, one capped test tube, one instruction manual and one color card. The API NITRATE TEST KIT for freshwater and saltwater aquariums Test Kit can be used in freshwater and saltwater aquariums.
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.
Is Discontinued By Manufacturer : No
Product Dimensions : 2.75 x 1.63 x 5.13 inches; 4.8 ounces
Manufacturer recommended age : 1 month and up
Item model number : LR1800
Department : womens
Date First Available : June 20, 2004
Manufacturer : Mars Fishcare
ASIN : B002DVVICS
Best Sellers Rank: #10,540 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Aquarium Test Kits
Customer Reviews: 4.7 4.7 out of 5 stars 3,075 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Contains one (1) API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit, including 2 bottles of testing solution, 2 color cards and 1 test tube with cap
Helps monitor and adjust nitrates and prevent invisible water problems that can be harmful to fish
Detects high nitrate levels from 0-160 ppm
Prevents algae growth that can be damaging to fish health
Use for weekly monitoring and when water or fish problems appear
Customers say
Customers find the water test kit works well and appreciate its quality and ease of use with precise instructions. The product receives positive feedback for its accuracy, with one customer noting it provides consistent readings, and customers consider it an excellent economical option. The color chart receives mixed reviews – while some find it easy to follow, others mention the colors aren’t quite discernible. The nitrate level testing also receives mixed feedback, with some finding it very good while others report it fails to detect levels at 100 mg/l.
13 reviews for API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit
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Original price was: $11.88.$11.00Current price is: $11.00.
I BUY TOO MUCH –
Works great but please read.
Works good, but make sure you arenât holding the tube directly against the card, otherwise you get weird light reflection and a skewed color. Hold the tube in direct, outside light ideally and about 1/2â to 1â away from the card until the color palette coordinates between the card and tube of water. As you can see in my picture, Iâm holding it away from the card to get the correct color, if it gets held too close, the color matches nothing on the card.
Sierra419 –
Great Product!
I went to the local fish store and purchased the Ammonia and Nitrite test kit (both look identical to this one, bot by api) for my new aquarium. They were sold out of the Nitrate and Ph at the store so I went to amazon and picked these up. I wish I would have looked on Amazon ahead of time! API sells a master test kit with all four of these tests (ammonia, nitrite, nitrate, and ph) that I bought individually for only $20!! So if you’re new to aquariums or you’re setting up a brand new one with no idea how to test water quality – I would definitely pick up the master kit. It has everything you’ll need! With that said, this single test kit performs flawlessly. These API test kits are the best that money can buy. They’re super cheap and theres enough liquid to last a long, long time.This particular test kit for Nitrate has a much more detailed and precise set of instructions than the other test kits they offer. Its not as easy putting a couple drops and shaking like the other kits. However, its not much harder either. Nitrate is a tricky thing to measure accurately, just follow the detailed instructions and you’ll get accurate results every time. My toddler can test the water accurately – so can you!
maria lopez –
Lo recomiendo
Buenos
Michael M. –
good price
Great product
m.boomer d. –
Best test chemicals for ensuring quality water testing
Love the API test kits for my aquariums. Simple easy to use and easy to read results
Mark Agostinelli –
Ask yourself – Does it have Orange when looking at results.
This Nitrate test is very good. Honestly, I used both the Salifert and API versions and they both work good. What is nice about the API version is that you can use the acid to test if rocks have carbonate in them by dropping a couple of drops on a rock to see if it bubbles. (look it up).Also, about the colors. It gets hard to distinguish the colors. The way that I do it, is I ask myself “does it have orange in it? If so, then it is one of the Orange. Then I ask myself if there is no orange then it is red! Or if their is no orange then it is Yellow. Seriously! Try it!. Do the test. Ask yourself if it has orange, or STILL has orange. it will then be easier to match to the card!I hope I explained that well.Good Luck
AR Family –
Excellent economical test kit with limited capability
I worked in three pet shops as a teen and later managed the slat water department in a very large pet shop in Philadelphia. I have kept fish since I was five years old but have been on hiatus for the past 20 years and not had any tanks.These kits have been around for ages and are very accurate if you use them for their true intended purpose; freshwater community tanks or similar. Don’t try and use these the nitrite or ammonia for saltwater tanks of any sort. Don’t use the pH test kit for tanks that need exact pH values for high pH animals like cichlids (though this is less of a problem if you read below). These tests are extremely economical and provide many more tests per dollar than any other kits available.My son is six and my daughter is four. We decided to raise tadpoles twice this year and needed to monitor ammonia, nitrite, and pH. The 40-ish year old design of these kits still fit that bill perfectly and were exactly what we needed. I wish the scale on the pH kit went higher, but it goes high enough for community fish. Tadpoles here tend to like higher pH values of ~8.2 and the pH kit doesn’t go that high. However, I got a rough enough estimate if the pH test indicated that the pH was off the chart high as water isn’t going to go much above 8.2 unless you use chemical inappropriately.Ammonia and nitrite test kits worked perfectly as in the past and averted many potential tadpole disasters and crying children. We’ve kept snails, clams, some minnows, and loads of plants in the tank while the tadpoles have developed so the bio load was always changing.Still great kits even after 40 years at a very affordable price.Highly recommended for their intended usage scenario.
Robbyg –
Great Test Kit for the price, it gives you a pretty good estimate of your Nitrates when they are high.
API kits are fairly accurate for the price, I highly recommend them for salt water aquarium owners that need and should have at least 2 kits of every important test type so they can cross reference results if they feel something is wrong with a particular test result. API fills that niche perfectly with pretty accurate easy to use kits that cost a quarter the price of the more accurate ones like Salifert, ELOS and Red Sea Pro.The API Nitrate Kit is as simple as it gets, just fill the vial to the marker or better yet use a syringe and add 5ml as directed. Then add 10 drops of reagent “A”. swirl for a bit then shake reagent “B” for 30 seconds very vigorously and add 10 drops of that. Shake the whole thing for one minute vigorously and then wait 5 minutes to get a result.IMPORTANT NOTE: If you forget to shake reagent “B” you might as well throw the whole bottle of reagent out. This solution separates out in the container after a few hours into layers of different chemicals. If you don’t shake it, you will be dripping out 10 drops of just one of those chemicals and remaining mixture will be compromised. The end result is that the next time you use it and shake it up properly the typically result is a lower reading than normal. Just remember to always shake reagent B properly for 30 seconds and you wont have any problems.If your Nitrates go down to reading Zero on the API kit, then it’s time to move to a more accurate kit that is designed to read very low Nitrate levels. If your keeping a SPS Reef Tank you need the Nitrates to be near Zero and the API kit will not be accurate enough to read the small amounts that may be in your aquarium. For FOWLR Tanks, Nitrate is not as not as big of an issue, so an API kit or two is all you will probably need.
Malak –
Did not come with the color chart card
Kushal –
Good Product
Lcocoyoc –
Producto indispensable para monitoreo de la salud de las bacterias que eliminan el amoniaco del agua salada de mis medusas.
valerio –
Ottimo
paul –
Excellent