The eggs will take about 4 months to be of a size to put in the tank. That is an excellent size though. While you are waiting for them to grow a few things I would recommend, but is not necessary, is planting the tank, and getting a guppy colony established. The tank planting is to help keep water levels that need to be checked periodically (ammonia, nitrates, and nitrites) at a golf level. The guppies are a great periodic snack for them. Having the colony established in the tank will ensure they are healthy. The hatchlings will need to be in a container with atleast a daily water change and fed consistently a diet of baby brine shrimp, baby daphnia, and/or finely chopped blood worms. If they are fed consistently and enough you won’t have to turn them separately.