Beginner Breeding ?'s Options

[HAWKEYE]

I currently have a male pearly zz that I plan on breeding to a female red dragon who will on the way from Thailand soon. My first question is how big of a tank do they have to have to breed? I currently have a 75 gallon that will have two Eheim 2217's filtering them. The tank will be divided for a few months until the female gets a little more size on her.

My next question is what size of a tank do the fry need? I plan on putting together a new 55 gallon within the next few months with a little less filtration. I want to grow them out to at least two inches and then sell them while I keep some of the better ones for grow out.

Any help would be great. Thank you in advance.