Dear Seachem,  I recently bought one of your Ammonia Alert products and I am surprised how good it works and how easy.  I am planning on buying one for every tank I have.  This has to be one of the best products for aquariums on the market. 
 
—Thomas Thumbarello

Seacem test kits are easy to use and very accurate. We use them in-store and recommend them to our customers.

—Jennifer Myerscough, Owner, Imagine Ocean

So far, I've used Seachem's phosphate, nitrite/nitrate, and pH/alkalinity test kits. I've got nothing but good things to say about all of them. Each kit uses 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. One thing I really like about these kits is the color chart. The color chart is made on a slide which gives a gradient to judge against, not just 4 or 5 colours. This gradient allows one to match colors more closely. These kits are slightly more pricey than some but most of them also give you at least 75 tests.

—jackdp

Ammonia Alert ™is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed.more...

Reef Status: Calcium. This kit measures all types of calcium, including gluconate calcium. The method is based on specific titration with a unique indicator. Measures in increments of 5 mg/L..more...