Well I see that you are off line now and probably wont be back until the morning, and unfortunately, due to the difference in the time zone I will be off line and in bed when you get up. So I will try to give you some advice on what to do until I get back on tomorrow.
Ammonia is produced by your fishes waste, and by other things such as left over food in the tank and dead fish in the tank. Whatever the case may be, there is always going to be ammonia present in your tank when you have fish. However, with an established tank, the ammonia and NitrIte are going to be so low that our test kits will read zero.
When ammonia is present in our tanks, beneficial bacteria (Autotrophic bacteria) colonize in our filters to process the ammonia.
1. First, the beneficial bacteria will process ammonia, when ammonia is process by these bacteria is turns into NitrIte.
2. There is a second type of Autotrophic bacteria in our filters that will process nitrIte into NitrAte.
3. There is no bacteria in our filter that can process NitrAte, so the only way to take NitrAte out is by water changes, usually only a 10%-15% water change is needed once a week to get NitrAte down.
Another thing that you need to know is: Ammonia and NitrIte are toxic to fish if they are above .25 ppm when you take your water readings. The fish may not show signs right away. But if they are exposed to a high level of Ammonia and NitrIte for too long, this could shorten their lives, and give them gill damage.
NitrAte is also toxic to fish, but in a greater quantity. Fish will be okay in NitrAte readings up to 40-50 ppm.
In you case, a fish-in cycle, your MAIN PRIORITY is to keep the Ammonia and NitrIte as close to zero as possible, this is done by water changes. Like stated above, do a water change, than check like 25 minutes later to see where you are at, and based on that reading you will know to do another water change or not.
-Simple math is all that is needed: If you take an Ammonia reading, and it says that you have 5 ppm in your tank, you know that you need to perform a water change to get this down below .25 ppm. So, lets say that you do a 50% water change. A 50% water change is going to take 5 ppm down to 2.5 ppm. 50% is half, so half of 5 ppm is 2.5 ppm. This "math" method will work for Ammonia, NitrIte and NitrAte.
Over the course of weeks, you will notice that your Ammonia and NitrIte readings are not go to be as high as often, and this is due to the fact that the beneficial bacteria are starting to colonize to process them.
So what can I expect first?
-First you are going to see a rise in Ammonia, since there are no bacteria to process this yet. But once bacteria start to colonize in your filter that process ammonia, you will notice that your ammonia is not going to be that high all the time, and then your NitrIte is going to start to go up.
Then, you will notice that your Ammonia is at zero almost all the time now, and your nitrIte is high.
You will then start to see your NitrIte go down and then you will see your NitrAtes go up.
After "X" amount of weeks, your Ammonia and NitrItes are going to be at zero, and your NitrAte is going to go up. This is due to the Beneficial bacteria in your filter that you have colonized over this whole process.
Things to remember:
You should use a gravel vac at least once a week, if not more, to suck up any poo. Poo that is left over in the tank is going to produce more ammonia, and that is the last thing you want right now.
You want Ammonia and NitrIte down below .25 ppm, and NitrAte not to go over 40-50 ppm
.
The only way to get Ammonia and NitrIte down is to do water changes, until there is enough bacteria in your filter to take care of this for you.
There is no bacteria that will process NitrAte, so you must perform weekly 10%-15% water changes to get NitrAte down, after the cycle is complete.
I hope this helps a little?
I will be back on in the morning, not sure what time for you, to help you out more with this problem.
But I hope after reading this that you will have a basic understanding on how this process works, and what to do.
Thanks for pointing this thread out to me greenscooby! As I would probably not have seen it if you did not.
Regards
-FHM