Jer4916, if your dad let it die, there is no life on it anymore. It is just rock. You need to get some live rock and put it in there to spread the good biological filtration over to all of your other rock. Over time, all of your rock in the tank now will eventually become live as well. Keep in mind, if and when you go to purchase live rock, try to get cured/cultured live rock. If it has any foul odor whatsoever, that is okay, it just means it is not cured. With that stuff, you will just need to bring it home and let it sit in a bucket of saltwater for 3 to 6 weeks with a powerhead in the bucket to cure it yourself. Like stated though, the fish in the tank are definitely beautiful looking, and they all look very healthy.
IrishSalt, angels are definitely one of the coolest fish in the ocean. The transformations they make are just amazing to witness. Any cool pics of your old emporer angel?