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2Shi 01-07-2013 01:51 PM

Tank Done Cycling... Now What?
My fish tank gets rid of 3-4ppm of ammonia within 24 hours. Does this mean my tank is done cycling?

If so, I am aware that I need to do a large water change to eliminate my high nitrate levels before adding fish.

What will happen if I add one fish (a small Cory) and only have that single fish in my 55g tank for 2 weeks? Will it be a problem if I wait too long before adding more fish? I'm afraid the beneficial bacteria I built up will die off.

sayurasem 01-07-2013 03:58 PM

Check for nitrite and nitrate. If nitrite is 0 and nitrate is high then your cycle is done.

You can hold off on buying the fish if you can. If not you can overfeed the Cory to keep the ammonia up for the bio filter. 1 Cory in a 55 gallon won't put out enough ammonia to keep a good amount of good bacteria in the filter. But if you are going to add more fish in the future make sure add them little by little to avoid mini cycle.

roadmaster 01-07-2013 04:45 PM

I should think four or five cory's would be safe to add if 3 to 4 ppm of ammonia is being processed within 24 hours.
This is way more ammonia than the four or five cory's would produce and 55 gal gives plenty of dilution due to large volume of water per fish.
Would add the cory's and wait a couple week's before adding more fishes.

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