Alan Silver wrote in message ...

Your calcs look fine, but remember that too much is not a bad thing.
Your tank will cycle quicker and you can always do a huge water change
afterwards. Remember, the bacteria live mainly on surfaces, so even a
complete water change will leave your bacteria colonies intact.

Forgive me Alan, but too much ammonia can be a bad thing. It is
possible to overdose ammonia during a fishless cycle. The following
is an excerpt from http://www.tomgriffin.com/aquamag/cycle2.html -

"It IS possible to add too much ammonia to the tank (generally several
times the amounts suggested in either recipe), as some individuals
discovered by mistake (thanks Boozap). What happens in this case is
that the ammonia will spike very far off the chart then the nitrite
will spike as well (also way off the chart), and it will continue to
spike for a very long time. Why? There are a couple of
possibilities... the first is that the filter media and surfaces in
the tank or oxygen levels are simply insufficient to grow and maintain
a bacterial colony massive enough to convert all of the ammonia and
all of the nitrite to nitrates. Another likely possibility is that the
ammonia levels are high enough to inhibit growth (through a
biofeedback mechanism) of the bacteria rather than promoting it. The
solution is quite simple, however. If you realize that you've added
way too much ammonia simply do a water change, or if necessary a
series of water changes to bring the ammonia and/or nitrite levels
back into the readable range on your test kit. Then proceed as normal
with daily additions of ammonia until the tank is cycled."

Good luck with your cycle!!