Hi,
I'm no expert, but we just had silver mollie fry born New Years day.
A couple of things i've discovered.
They LOVE water change! I've tried to do a partial water change daily. I did this whilst they were in the breeding net, and now i've moved them to a seperate tank.
Because they were in a community tank as soon as i noticed they were attracted to the bloodworms i fed the other fish i began giving them a little (frozen) I think the chasing was more fun for them than the eating! lol. One would grap a worm and run around with the others chasing and snatching. Funny to watch!
Anyway, we had about 40 fry and it soon became too crowded (about week and half) in the net. So luckily i had another tank to use. I rinsed the filter in the water of the new tank and got it up and running for 2 days before putting the fry in. I put in some floating plants. They have really thrived. I've now put in the adult Mollies.
I feed them 3 times a day. They have ground fish flakes and a little frozen bloodworm.
I still do partial water changes daily which the clearly love.
Hope that helps. We all have to learn by experience! lol (still learning!)