what i would do..
Sounds like they are at the wriggler stage.. the eggs with tails that vibrate. They have actually hatched out at this point and are living off the yolk sac, which is too heavy for them to really swim just yet. Wriggler stage for rams should last two to three days. After this, if Mom and Dad are still interested in them, the parents will parade them about the tank looking for food. In a planted tank you are way ahead of the game, infusoria and other yummy micromunchies will be growing alongside the plants.
The angelfish concern me a lot. If your rams pair bond isnt very well developed they may cave if the angels charge try to attack the fry. Most dwarf cichlids will throw themselves willingly at fish that are even 5x their size to protect their babies. With many pairs this constant threat will strengthen the pair bond and inspire the fish to get it right.. but sometimes this results in so much stress that the male/female try to maximize their return on all the energy they put into the fry and will eat them themselves. Rams are notorious for this and the going theory is that they are too inbred and have lost much of their natural parenting behavior.
What I would do - once the fry go free swimming, scoop up about half of them (siphons work but are a bit stressful on delicate babies) and rear them in a separate tank. Something like a cheap ten gallon with just a heater and a sponge will work beautifully. Feed heavily with microworms as soon as they can take them, move on to BBS and grindals as they grow. Siphon/vacuum the bottom of the tank daily, remove about 10% daily of water and exchange.
I'd only remove half as you will want to observe the behavior interaction with your parents and the angels. They may surprise you and raise all the remaining babies by themselves jsut fine in a community tank. But, in case they dont succeed, you will have a small group of fry to raise on your own so you dont lose out totally on this particular spawn.
Good luck with them - email me if you need a source for microworms, I should be able to help.
>Sarah