They'll also need rather soft water. You probably alreay have that since they spawned in the first place, but mix a little distilled water into the hatch tank to make sure.
Keep fungus out, don't let the lights be bright.etc. Keep temp steady.
While waiting for the hatch, gather up some food for the tiny, tiny fry.
By the way, congratulations. Phantoms are very difficult to spawn. You must be doing
something right.
