Hello again, I was going to post this originally but didn't know if you had previous experience with cycling, there are two types. FishLESS and Fish in (with fish).
Fishless cycling is IMO
(in my opinion) the best way to introduce pure ammonia to the aquarium. The ammonia is convered to nitrItes as a by product of one type of bacteria and the nitrites are used as a food source by another type of bacteria and creates nitrAtes as their by product. No fish are in the tank during this method
Ammonia is generated by fish waste, decaying plants, and fish food. If there are not any beneficial bacteria to convert it by the nitrogen cycle into less harmful nitrAtes, then it will cause your fish to become sick and ultimately die.
The fish in cycle (not my choice) is by using the fish waste and food to get the nitrogen cycle going by the breakdown of them creating ammonia. Your fish will suffer and perhaps perish in the process. it can also take much longer due to the small amounts of ammonia that can be introduced because the ammonia again will harm the fish.
I am attaching an article for you to read and it explains the process. The choice is yours. Dont be insulted by the name of the article. It wasnt intended to be insulting.
Local Fish Stores sometimes only want your money, by properly cycling your aquarium, you will save time in the long run and hopefully will cause no harm to your new pets. We dont want your money, just you and your fish to thrive, not just survive. We will help you anyway possible.
Fishless Cycling For Dummies