I have not have the room to try to split my H. magnifica yet.
About the Orchid dottyback, it is really easy to pair them up. It is best if you get at least 1 small one. Immature Dottyback are female and the dominate Dottyback is the male. You will need a larger type aquarium because even after they spawned, the male can be rough on the female. My pair have beign spawned several times now. By observed the stomach of the female, you can determine when pair spawned. After that, the male is very reclusive for 1 week to 10 days or so. The last time when I was in Austin, there were quite a few Orchid dottyback for sale. I was looing for them for a long time befor I got my pair. They are very interesting and beautiful fish.
Minh Nguyen