In article , Victor M. Martinez wrote:

I used Prime for conditioning water. I only made one water change around
day 3 or 4, IIRC. I also added Fluorish, Fluorish Excel, Fluorish Iron,
and Freshtrace (all by Seachem) when I setup the tank.
The tank has both bogwood and holey limestone and the substrate is pure
fluorite.

With all the additives there I am guessing that you have plants.

I am still not convinced that BioSpira and the like do anything
special. I saw similar numbers to yours when I cycled a 20gal with
household ammonia and two clumps of Java Fern. The only time that
ammonia was detectable was after adding the daily dose of 2-3 ppm
(mg/l) worth of household ammonia.

We need more tests I think. Does anyone have a $2000 grant handy :-)

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sg