Seachem Laboratories Aquarium Test Kits
Seachem Laboratories test kits, like other Seachem products, have thoughtful features that consider the practical considerations of the aquarist. Basic kits as well as kits for reef elements and plants use a 6 welled plastic plate to take the samples. You only need about 1mL for the sample, so if you test a lot, you are not emptying your tank. The color charts are made on a slide which gives a gradient to judge against, not just 4 or 5 colors. allowing you to match colors more closely. These kits are highly accurate and very well reviewed.