You should remove dad when the fry are free swimming ie not falling to the bottom of the tank. Some people do leave dad in the whole time, but there is a good chance he will eat his babies.
You must get your microworm culture going straight away. Make up some ready brek/ porridge oats with water not milk. Some people add yeast as well, but I've never bothered. put it into a plastic container [the ones that you get Chinese take away in,are great] It must have a lid, and make small holes in the lid with a hot needle.
Add the culture to the top, put on the lid and leave in a warm place. Just on the top of the tank works for me. You should have microworm crawling up the sides within a few days. I find it best if they go onto the lid underside as they can be collected without any of the oats, which will foul the tank. If it looks too dry, spray with a small amount of water. You can also add a few fish flakes for the microworm. You should add some dry oats to this culture every week.
Don't worry if after a few days the mix looks horrible. Just leave it and it should sort itself.
Ideally the culture should be made before you mate your fish, to be ready. As a stopgap, try liquifry No 1.
As to brine shrimp. I only really use the decap ones. Never had much success with the live. They will need this after about a week though, and they take 24 hours to hatch.
