Welcome to the board! I have only had to do this once since I started my reef. However, by the time I found the pgymy angel, the clean-up crew had been at work and they drug the remains (which was not much)out into the open. In fact another 12 to 24 hours and nothing would have been left. I also did not have an ammonia spike which really surprized me. I use a long chopstick to move stuff inside the tank. You could try something like that. However, you may well end up mving rocks!
Good luck,
Connie