API Nitrate Test Kit for Freshwater and Saltwater Aquariums, 90-Count Box

A very useful test kit for keeping track of water quality in both freshwater and saltwater aquariums. The results are clear and easy to read using the colour chart, which makes monitoring nitrate levels straightforward even for beginners. The kit feels well made, and the glass test tube is sturdy and easy to clean after use. The instructions are simple to follow, and the testing process only takes a few minutes, making it convenient for regular weekly checks. It’s particularly helpful for spotting potential water quality issues before they affect fish or plants. Regular testing helps keep nitrate levels under control and supports a healthier aquarium environment. Overall, a dependable and practical kit that does exactly what it should. A good addition to any aquarium maintenance routine.

Very easy to use and accurate. Lasts a long time as you only need 10 drops from each bottle at a time. I have always used this one

Easy to use

API is the only test kit I use. Accurate and the devilery is good.

I have found this test kit easy to use and have confidence in its accuracy to detect nitrate in the aquarium water. Knowing what the nitrate level is to begin with in the domestic tap water supply I have been able to gauge the increase by comparison following the aquarium water test. I have found that the colour achieved from the two tests is very similar so from this I deduce that the aquarium water is being well filtered, ammonia/ammonium levels are low and that safe nitrate levels are being achieved. The tap water where I live has reasonably low levels of nitrate so any large increase would indicate a problem in my aquarium. You must make this comparison as you cannot be sure without it if the nitrate is being 'manufactured' by the fish or is already in the water. The test card with the colour comparison check list is quite difficult to read at low levels where the orange colours are so close together. However, the very low and very high readings (colours) would be easy to differentiate as they are so different in colour. Inspect under natural lighting conditions and hold the test tube to the side of the test card as holding it against the opaque test card makes the reading look darker than it actually is. The kit will enable many tests to be carried out so it really is value for money.

Seems to be a very accurate test. I will buy again.

GreAt

Good test kit for Nitrates. The colour chart is a little bit difficult to gauge but advice online seems to be to focus on the hues (orange/red) rather than the saturation. Turns out my tap water is 40ppm nitrate so this has made maintaining my aquarium a lot more...interesting!

I feel more confident about my aquarium's health.

Good Product

Precise and good value

Solo para monitoreo general no es muy importante este parámetro en acuario plantado y peces

I’ve been using the API Nitrate Liquid Test Kit for a while now and it’s been rock solid. The instructions are clear, the bottles are easy to work with, and the color chart is straightforward to read under normal lighting. I appreciate that it’s a true liquid test and not strips, so the results feel much more reliable and consistent. The test has helped me stay on top of nitrate levels in my tanks and catch trends before they become problems. The reagents last a long time, and as long as you follow the directions and shake bottle #2 thoroughly like it says, the readings are repeatable. Overall, it’s accurate, dependable, and worth having if you care about water quality. I wouldn’t hesitate to buy it again.