06-06-2013, 01:58 PM
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It can take 6-8 weeks to cycle a new tank...sometimes even longer, especially w/o a bacteria seed.
Be patient, stay on top of water changes to keep the ammonia on the low side as ammonia is toxic not only to fish, but in excess even to the bacteria/archae that convert (oxidize) it to nitrites and nitrites to nitrates.
Originally Posted by zkessler
My tank has been cycling for about 4 weeks now. Up until 5/4/13 it was only on the ammonia phase. I did a 50% water change on the 4th because of really high ammonia levels, and waited 2 hours and tested the water again. The ammonia had dropped to 3.0 and nitrites finally appeared at 0.25ppm. Needless to say I was happy to finally see nitrites. On the 5th I tested the water again prior to a water change to find ammonia at 6.0 and 0ppm nitrites. Can anyone help with this problem? I'm new to the whole water chemistry thing and have a basic understanding of the cycling process just not the best trouble shooter.