I have reluctantly placed an ad to sell some of my angels. One person that wants some is setting up a 60g. He didn't understand cycling and was pretty disappointed when I told him he could not have them yet. He has since been educated a bit about the whole process and its importance. Unfortunately, he also put goldfish in there. I told them they had to go or no angels, non-negotiable. Here's my question. Can he cycle the tank with goldfish in(I am coaching him on accomplishing that with as little stress on his fish as possible), remove the goldfish, and convert it to a community tank? Once cycled, what's the best time frame for moving one and adding the other and maintaining the cycle? I want to help him provide a good home for my babies.