Oh gosh that is a long time! I have a hard time believing most people do that. I may as well just set the 20g up right away and forget the 10g. 20+ years ago I started up with only one platy. It survived (I think) and it took about 6 days. But I don't want to have to look at bloody little gills. But that will be nearly 2 months. I have to think about this.It's mostly around 6+ weeks to fish-less cycle. I know it's hard to wait, but it will be worth it. Hang tough!