A piece of shrimp rots and makes ammonia.
The ammonia is consumed by a certain type of bacteria and results in Nitrite.
The nitrite is consumed by a different type of bacteria and results in nitrate, which accumulates.
When you have tested and witnessed the ammonia come and go, and when you have tested and witnessed the nitrite come and go, the "cycle" has started. Remember it never ends however, so the "cycle" is never "over".
When the Nitrite and ammonia are not detectable, you can do a water change to reduce nitrates a little, and add a clean-up crew. They'll eat the algae thats grown, poop, and create more ammonia to keep the cycle going.
If you just add the Aquaforest bacteria, so as to hurry the process along I suppose, there still needs to be an ammonia source, either fish food, a piece of table shrimp or actual ammonia, something to feed the bacteria you're adding.
Huge fan of the tried and true here - a piece of shrimp and time. No fancy/expensive additives or short cuts.
Later, adding a bacterial supplement to assure a healthy diversity, or to feed coral, is another thing alltogether.
Just my $0.02. [emoji4]