Quote Originally Posted by SABOB View Post
Also had bad readings with an API Nitrate kit.Aquarium Designs tested it at 10 ppm,my API was reading 200.API are fine for Calcium,Alkalinity but not for Nitrates.
I didn't like their Ca test kit. It kept telling me my Ca was in the 700 meq/L range. The lfs and Seachem helped me determine it was really around 450 meq/l.

Just FYI. Saw a posting on another SW forum and a rep from API admitted that the real problem w/their NO3 kits is the active testing agent in bottle #2 and the fact that it settles very quickly. He stated that even agitating it for 30 secs (as the directions suggest) may not be enough to get correct results.