amonia problem

Hey guys! So I am brand new to all of this! I had some Betta fish when I was younger but honestly was too young to properly take care of them. Durning the quarantine, I decided to buy one. When I did, I set up the tank how most people would think it is okay to set up a Betta tank because this...

For the life of me I cannot get my newest tank to cycle. (my first one did it perfectly). It's a 29 gallon glass that has 2 zebra danio's in it (backstory - one mean danio is responsible for the death of a number of his peers and all the danio's were upsetting my 1st tank because they can be...