Hanna Checker - Nitrite Size:0 to 600 ppb NO₂-N If your pond contains goldfish

If your pond contains goldfish or Koi however we do not recommend the use of this product

You are looking at the world’s most advanced biofilter media

Ovadine® is a non-staining

Low profile design

It can inhibit nitrification and should not be used in systems with a biofilter unless the biofilter is taken offline first

Hanna Checker - Nitrite Size:0 to 600 ppb NO₂-N If your pond contains goldfishHanna Checkers are small, handheld colorimeters that provide higher accuracy results than typical chemical test kits. Offering improved technology, these portable colorimeters make measurement hassle free with their simple design and easy to follow instructions. Features at a glance: Easier to use and more accurate than chemical test kits Dedicated to a single parameter Small size, big convenience Ideal for: Aquaculture & Aquariums, Water Quality