API Nitrate 90-Test Freshwater And Saltwater Aquarium Water Test Kit, 5 Count (Pack of 1)

easy to use and works well

Been using this for my Rift Lake cichlid setup where high pH is the norm—this kit reads up to 8.8, so it’s ideal. Comes with the test solution, vial, and colour chart. Just fill the vial, add drops, shake, and match the colour. Takes less than a minute and results are easy to read.I’ve tested it against digital meters and it’s bang on. No clouding, no dodgy readings. Works well in both freshwater and marine tanks. I use it weekly and during water changes to make sure things stay stable.The kit lasts ages—160 tests is no joke. Bottle seals tight, and the chart’s printed clearly. No guesswork, no drama.👍 Pros✅ Reads high pH—ideal for Rift Lake and marine setups✅ Quick results—under a minute✅ Clear colour chart—easy to match✅ Reliable—matches digital meter readings✅ Long-lasting—160 tests per kit👎 Cons❌ Manual process—needs vial and drops❌ No digital readout—just colour matching❌ Can stain if spilled—wipe up quick❌ Doesn’t cover low pH ranges🧭 Personal ReviewIf you’re running a high pH tank and want reliable readings without the faff, this API kit earns its spot. I’ve used it across cichlid builds and marine setups—no drama, just clean results and peace of mind. Proper stash-ready gear for anyone who takes water chemistry seriously.

Excellent service, great product, a must for the health of your tank.

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.

As others have mentioned, initially the dropper bottle will drip quickly when turned upside down, so a little care is needed, and it will do it less after a few drops have been used. Otherwise straightforward to use.

Vital part of responsible aquarium keeping. Easy to use and happy with the increased ability to check tank levels. Kit lasts a long time, value for money!

This API GH & KH test kit is a must-have for any freshwater aquarium owner. It's easy to use and gives clear, reliable readings for general and carbonate hardness. Keeping these levels balanced is crucial for fish health. Highly recommend for maintaining a stable tank environment

This product really works well for me. I’m new to fish keeping, as I saw no ammonia change in my aquarium, I naturally thought I broken the cycle. On top of that I found it hard to pinpoint a colour match. But then I chose to err on the side of caution.This really put my mind at ease. As I was using test strips before and it didn’t have ammonia test for some reason.