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Re: how soon to add fish...
I found an interesting article regarding an alternative to tank cycling at
the following: http://www.tomgriffin.com/aquamag/cycling.html
The author recommends using actual ammonia (sans other detergents, perfumes
etc.) to cycle the tank, and did this himself, as follows: (some relevant
copy and paste)
<<In order to cycle a tank using ammonia, start everything up and add some
gravel from an established tank or a few potted plants (their roots contain
all of the necessary bacteria, and the plants themselves do not seem to be
harmed by this process). Then simply add 4-5 drops of ammonia per 10 gallons
per day until you get a nitrite spike. Once you have nitrites, cut the
ammonia back to 2-3 drops per 10 gallons per day until the nitrites
disappear. When you get a 0 ppm nitrites reading, you have a fully cycled
tank.
<snip> . . . and this is of particular interest, the tank will cycle much
faster by this method. I have used this method twice, the first time was on a
45 G tank with a fluidized bed filter, the second was on a 10 G tank with a
lowly sponge filter. The time for complete cycling of these tanks was 12 days
and 14 days respectively. Compare that with the standard method which
averages 4-6 weeks.
Finally, once the tank has been cycled, the bacterial colony created by this
method can handle a large bioload immediately. The amount of ammonia added to
the tank during the cycle is significantly higher than what would be
contributed by a small number of hardy fish, therefore, a much larger,
healthier bacterial colony exists at the end of the cycle using ammonia than
would if you used fish.>>
Depending on how heavily planted, there may be excess ammonia (and nitrites)
that can be harmful to the fish during cycling.
Sylvia
<< I have a question about when to add fish to a new tank. I am setting up a
50 gallon planted tank. At my local fish store (BTW, when you refer to
LFS, is this what you're referring to???), someone told me I *should* add a
few hardy fish (tetras?) after just a couple of days in order to get the
bacteria going, and then add a few more each week. But I have read that
some people wait as long as two weeks to add the first fish.
>>