Originally Posted by Gallium
I've got a female really ready to drop eggs, though she is a bit ugly haha. If I undergo a test breeding since I've never done it before, When and how do I choose which fry to cull?
I bred guppies for a long time so I've got everything I need equipment wise (including lots of jars with thermal mat heating), is it worth trying a test breeding with this guy, or wait until I find a compatible female and risk missing my breeding window?
Look at your options compared to what is available to you. What do you mean by "breeding window"? And how long until you can breed again? If the interval is 1 year, perhaps you should breed him to what ever female you have . . . given that her form isn't that bad.
Do you have space and supplies for 2 spawns? If you do, then I say breed him. And when you find the right female, breed him again.
The black dragon female is OK. She won't improve your male's dorsal, but she will produce fairly equal quality fry, if not slightly better. I'm not too sure about her color genes, as I don't really know dragon genetic make ups. But IME copper x black dragon will produce some black coppers, coppers, and partial dragon scales.