Followup on this thread:
I email kordon & they state that Amquel plus will not alter nitrite or nitrate tests, but they won't say how it works - trade secret?
As a test, I took some water from my tank, with nitrite measuring 2 - 3, and added double the amount of conditioner (for the volume of my water sample), waited an hour, & comfirmed that the sample now tested negative for nitrite.
So I can conclude that - 1. nitrite is removed & 2. I can measure it with my test kit.
An interesting fact - while poking around the net researching this thing, I ran across an Amquel Plus look alike - Prime by Seachem, which basically do the same thing & seem to have the same effect on test kits - ie interfer with Nessier test on NH3
but not NO2
& NO4. However, Seachem stated that the effect disappear in 24 Hours! I wonder if this is the same with Amquel Plus as well.
I was going to run another test, ie add the conditioner to tank water with NO2
, & test in 1 Hr & 24 Hr. However, my tank had rapidly finished cycling in the last 2 days & now I have no measurable NH3
), so I will have to leave this experiment to someone else who is interested.