Looks like a zoanthid, xenia, hammer and toadstool. Not sure why you got ammo lock if you’re cycled. You’re gonna wanna consistently test some parameters if you want those frags to get any bigger
The reason I got for the ammlock from two people at LFS had to do with possible hitchhikers. they were soaked in a solution per the directions before placed in the tank.
add I know I could ask which parameters are most important to check, but I bet that's all over these threads.