I use kens grow crumbles in the appropriate size.#1 and 2 will be good for juvi livebearers and the adults may enjoy it also.My swordatils and rams love these foods.....
Ken's Premium Growth Meal #1
Ken's Premium Growth Meal #2
I also offer Golden pearls at around 300-500 microns.
Golden Pearls 300-500 Microns
The adults will eat all those foods as well and there are larger sizes of both available..
I also use high protein fry green granules .
Ken's High Protein Fry Green Granule .5 mm
Good luck and enjoy.
They ship for free over $49 so shop the site.This where I get many of my heaters and aquaclears from also.
I order pounds of each so if you only want food and don't want to spend $49 maybe I can hook you up since I ship fish every Monday anyways...