I say, if you KNOW you have pure Midas, try to find another midas female for him.
With that being said, if you just want to watch the spawn, then maybe this will help you:
1) I would bet the only reason they haven't bred for you already is that the female is just not getting enough food. Possibly remove the male, and try to pump the female. Do it for a week, pop the male back in, and you SHOULD see a breeding.
2) If you can not move the male, try the divider (or incomplete divider method). I personally HATE dividing my tanks like this, so instead when I throw them in smaller tanks to breed, I throw a clay flowerpot in a BARE tank. Grab a thick piece of slate so that it blocks the opening of the flowerpot, but only as much to allow the female inside, and keep the male outside.
Mine either bred on the slate, or in the flowerpot, though when they bred in the flowerpot, I had very, very low batches, as only a small amount of the eggs actually got fertilized.
You have to really keep an eye on them when you seperate a pair into a tank by themselves. Males can make quick work of females. Once you realize this, you will find they are as easy to breed as convicts, really.
Good luck!