The colors are hard to match at times so I question the accuracy of these. There are multiple strips for a very good price.

I absolutely love and recommend this product. I ordered this test kit on Thursday 9/7. It came today on Monday of 9/11. That is a pretty good shipping time. Also, I had nothing to test my ten-gallon aquarium with until now. With a 7-in-1 test kit, for about 20 dollars cheaper than a Top Fin or API test kit, I can actually relax knowing I have good water parameters. Also, for my new 5-gallon that is coming, I can know for sure when I can add fish.

10/10

These work great for what they are. Quick, easy, inexpensive. For true testing you need a full testing kit but these work to get a quick sense of how the water quality is holding up. With a lot of bioload in my tanks I like to test a couple of times a week to make sure everyone is safe and happy.

These test strips are useful for making a quick evaluation of your tank to ensure nothing is seriously wrong. The API test kits showed the following for a tank halfway cycled:
- pH 7.0
- Ammonia 0ppm
- Nitrite 5ppm
- Nitrate 20ppm
- GH 12dgh (215mg)
- KH 2dkh (36mg)

The test strip (bottom strip in photo) showed:
- pH 6.4
- Ammonia not tested
- Nitrite 5ppm
- Nitrate 25ppm
- GH 300mg/L
- KH 0mg/L

Keep in mind that API kits measure GH and KH in degrees, while these strips measure mg/L. One degree of hardness is approximately 17.9mg/L, meaning API said my GH is 215mg/L and KH is 36mg/L. Unless I'm colorblind or doing something wrong, GH should have been one shade paler and KH should have been one shade darker (not really too far off, all things considered) - but when testing my tap water, which is a pH of 8, 7dKH (125mg/L) and 18dGH (322mg/L) according to API, the test strips were dead-on accurate. I cannot tell if the chlorine test is accurate, as our city states that they maintain the water at 0.8-1.0ppm but our area is outside city limits and seems to have slightly different parameters than what is listed on the city website. I would still expect some chlorine, but it did not register on the test.

So bottom line, it's reasonably accurate for the most part, but I'd use a different test strip for pH. pH is a logarithmic measurement, so the closer to 7.0 you are, the harder it is to measure. Even API tends to be difficult to differentiate at that value and uses an entirely different test for high pH. Most test strips I've seen use 4 different squares, not one! For *all* parameters listed, I wouldn't expect total accuracy at either the high or low end of the spectrum - but it'll definitely put you in the right ballpark and tell you if something has changed since the last time you tested. I take a picture of the test strip next to the bottle at the one-minute mark, and save all my results for future reference so I can compare from week to week. If something is wrong, bust out the liquid chemical tests.

Very easy to read. Very accurate as well.