Aug 26, 2016 #21 K Kungpaoshizi Valuable Member View Badges Joined Jan 22, 2014 Messages 1,309 Reaction score 513 Location Earf Rating - 0% 0 0 0 Good to see it was the test kit, my first thought was your bacterial masses have crashed or food got dumped in.. :/
Good to see it was the test kit, my first thought was your bacterial masses have crashed or food got dumped in.. :/
Aug 26, 2016 #22 Randy Holmes-Farley Reef Chemist View Badges Staff member Super Moderator Excellence Award Expert Contributor Article Contributor R2R Research My Tank Thread Joined Sep 5, 2014 Messages 67,894 Reaction score 64,327 Location Arlington, Massachusetts, United States Rating - 0% 0 0 0 In many kits, nitrate is reduced to nitrite (with cadmium metal or other reducing agent) for the actual detection detection. Oxygen may also be reduced and so may deplete the reducing agent if it enters the kit in sufficient quantity. The chemistry is described here: http://www.open.edu/openlearn/scien.../test-kits-water-analysis/content-section-3.2
In many kits, nitrate is reduced to nitrite (with cadmium metal or other reducing agent) for the actual detection detection. Oxygen may also be reduced and so may deplete the reducing agent if it enters the kit in sufficient quantity. The chemistry is described here: http://www.open.edu/openlearn/scien.../test-kits-water-analysis/content-section-3.2