Yes! Get some liquid tests for ammonia, nitrite, and nitrate. Monitor the levels on a daily or at least somewhat frequent (every other day) basis. You need to add a source of ammonia (hypothetically I think the stuff you added should be doing that, but I haven't tried it and people around here seem to have mixed opinions about it). This can be a small piece of shrimp or something, or even a few drops of household ammonia (just don't make the mistake I did the first time, and MAKE SURE it ONLY contains ammonia -- no surfactants, coloring agents, scents, etc.).
Then, watch the levels of the chemicals. First you should see the ammonia go down and the nitrite start to go up. As my ammonia got to zero, I would add some more to raise it to around .5 again. (I used household ammonia...not sure if you would need to do this if you were just letting a piece of shrimp rot though.) As this goes on, you should see the nitrites spike. This means that you have bacteria that are converting the ammonia into nitrites. Now what you need to wait for is to see the nitrates rise, which means you have bacteria converting the nitrites to nitrates. If you have plants, they will consume some of the nitrates. But once they get above 40 or 60 or so, you should do a water change to reduce them.
You will know your tank is ready when can put in ammonia and find it changed into nitrates within a day or (preferably) less.
At least...that's the way I did it...based on info from several different places. Seems to have worked out fine.
Some people also cycle using live fish as their ammonia source, but that is usually dangerous to the fish...and you would probably want to make sure the fish aren't sick/carrying parasites, etc. first...