02-17-2014, 04:39 PM
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Comparing your two sets of test results, it looks like cycle is starting. First step is to produce or suppy ammonia. Then the ammonia is pprocessed by bacteria into nitrite. Both ammonia and nitrite are very toxic to fish, but they are also eliminated by a healthy tank with mature bacteria colonies.
After nitrite is produced the tank can become colonized by another type of bacteria that processes nitrite into nitrAte. Nitrate is much less toxic to fish, but it cannot be eliminated by bacteria- you must remove it by changing out old water for fresh water. I change 25% per week but others have different procedures regarding amount and frequency. Plants will use some nitrate, but unless you have tons of plants and only a few small fish, you will have to change water to keep nitrate from accumulating.
When your tank is mature you should look for 0 ammonia, 0 nitrite, and 0-40 nitrate. I try to keep my nitrate under 20, but I might be a little over cautious.
Just a little info in case you're not sure about nitrogen/ bacteria cycle.