I start my fry at 100 micron .
Kens fish food is really affordable so I get every size of Golden pearls and Grow meal .Over 4 sizes of each ..
The affordability of Kens food is how my fish manage to eat Als Blackworms daily also !
I think between the three foods I really have a winning combo ..
You should find the pair you like best get them a 10g tank and place it right next to others so they can see each other ..
That will be your best bet and most fun of all the learning ..
I keep my pairs side by side in shotgun tanks with a white divider across the bottom half of tank for privacy ..
I make them eat face to face and the behavior is outrageous ! They get mad when you feed the neighbor first ..Real mad !
The spirit of competition kept in check works great for the flashy little fish ..