[color=navy]

Hi Peter, you may not know this but you have joined the best forum going, full of really nice aliens! Amnagrla asked if you are feeding your tank anything.
Have a cup

and sit back this is a long one.......
You have to keep feeding it every day, or put a chunk of raw fish in the tank, OR put a few really tough fish in to start producing ammonia. Until you have a constant supply of ammonia the bacteria that break down the ammonia will not reproduce. They have to change the ammonia into nitrites, before the bacteria ( a different one) can grow, and flourish to change the nitrites into nitrates.
When you go up in ammonia and nitrites your tank IS NOT SAFE for fish, without your doing massive water changes every day, this is the reason many people will do a fishless cycle. The water IS SAFE for fish when the ammonia goes back down to 0, nitrites are 0 and nitrates have gone up around 5. So the only other thing you will have to watch is not to add fish too fast, keep the total number of fish down to 1 inch of expected adult size fish per gallon of tank. Then as you have fish in the tank, do regular tests on the water and if nitrates go up over 10 do partial water changes to try and keep them down between 5-10. One thing to watch to try to keep your nitrates down is don't over feed your fish, because the rotting food produces lots of ammonia. This whole Nitrogen cycle can take from 4-8 weeks! Don't rush things.
On the other hand if you want to speed it up, there are things you can do. You can purchase Bio-Spira from a fish store if you are lucky, or order it on line from one of the suppliers, OR you can put some gravel from an established tank (must keep moist at all times or the bacteria die), OR you can use some filter media out of an established cycled tank, and put it over in your tanks filter to seed yours with bacteria, (also have to keep this moist at all times).........Any of these MAY speed your cycle. But don't trust anything till you see those magic 00 on ammonia and nitrite.
Best of Luck!
Fish in the Frozen North