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ok i get what you're saying and i read your articles, but im kind of confused. The article says to put some ammonia (which i dont know why) in the tank, and if i do what should i put in there? And also, it says you need air to help the healthy bacteria grow, would it matter if it was a regular ornament on one side of the tank or should i get an extra stone and put it on the other side of the tank?
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The rationale behind adding the ammonia is that you are reproducing the situation of when you first add fish to the tank- but without any fish to suffer this rather toxic sitaution.
Just to run through quickly:
When you add fish to a tank they produce ammonia (wee, poo, breath). Ammonia unfortunately is toxic to fish, that's why they sometimes die in a new tank. In time friendly bacteria (always present in the water) will grow, fed by this ammonia, to the extent where there is enough of them in the tank to deal with the ammonia. They turn it into nitrites, unfortunately also toxic to the fish. Given time, other friendly bacteria (naturally present in the water) will reproduce to the extent that they can take care of the nitrites and turn them into nitrates= a lot less harmful to the fish. At this stage the tank is said to be cycled- BINGO!
When I started keeping fish, it was thought that the only possible way of getting to this stage was to start keeping fish who could produce enough ammonia to get the bacteria growing. Of course this meant that some of your fish had to live through this toxic situation, in order to provide the ammonia to get the tank cycled so it wouldn't be toxic to fish. Sad but considered inevitable.
Then one day, somebody had a seriously bright idea: hey, if those starter fish are only there to add ammonia, why can't I add ammonia out of a bottle and grow my bacteria colony on that? The bottle won't mind and once the bacteria has grown, the tank will be safe for fish.
So they started experimenting and found it works just as well. You add drops of ammonia either every day or as the ammonia goes down in the tank (look for a thread called Two methods), the ammonia-eating bacteria grow, then the nitrite-eating bacteria, you monitor the process via a test kit, and will know exactly when the tank is safe for fish (dont forget to do a big water change right at the end of the cycle).
You can find ammonia (pure household ammonia, must contain nothing but ammonia and water) at hardware stores, not in lfs. You can plant the tank before or during the fishless cycle, the plants don't seem to mind.