Your cycle is not yet finished until the Nitrites are 0 and the Ammonia is 0 and the Nitrates are below 20.* You might try testing the water straight out of your tap to see what the Nitrate level is right out the tap as I for one have high Nitrate levels out of the tap and some other aquarium owners also do.* this can affect the cycle process.* If you do this can affect your levels, if you could let us know these readings it would help me in answering this question as I would know if the nitrates were naturally high or just high because the cycle is still not completed.* But the nitrites* are still not low enough for you to add fish.* They need to be at absolute 0.* Most fish are very sensitive to ammonia and nitrite and nitrate is a growth inhibitor for fish.*
I am like Boxermom though, if there is nothing in the tank right now to keep the bacteria will not live unless you do one or more methods of fishless cycling.* You will need to read the following article to understand the methods involved.* If there are no longer fish in the tank you can keep the remaining bacteria alive by using one of the methods listed or by using a combination of Bio-Spira and them replacing the fish right away, but using a light load of fish to start out.* But you cannot do anything until you have the nitrite level at 0. (other than using a fishless cycle if you have no fish left, but do not begin a fishless cycle if there are still fish in the tank.)
http://www.Fishlore.com/NitrogenCycle.htm* *
Please read the whole article especially paying attention to the part about the different ways to do the Fishless Cycle.* Of the several ways, the ways in order of quickness of time are Bio-Spira (not sure it is listed) it is a product that allows you to add a load of fish immediately, the pure ammonia method and the fish flake method, then the disintegrating fish or shrimp method.* The last two take longer because they take a while to form ammonia where the ammonia is added right away with the ammonia method and the Bio-Spira skips all the steps and adds the active bacteria.
Rose