Hello and Welcome to Fish Lore. Below is a link you will find very helpful and is a necessary procedure for fish keeping.
http://www.fishlore.com/NitrogenCycle.htm
I see in your aquarium information that you have 5 fish in the tank. Do you know your ammonia, nitrite and
nitrate readings now? It would be a big help if you could post them. Too, if you can tell us exactly how you are cycling would be a big help as well.
Are you using Tetra Safe Start (TSS)?
The more information you can share the more help we'll be able to give!
Again, Welcome to Fish Lore

Ken