I wait about 10-15 mins for them to set a bit. I then wash my hands and roll my finger gently over the egg, one at a time, until it sticks to my finger and stransfer the egg to the container I want them to hatch in. Either stick to the side or the bottom. The container should be very clean. I've used a guppy breeder with nylon around it and I have eggs now in a floating container. Add an airstone so nothing lands on the eggs to cause bacterial or fungal infection. I keep mine dark, only using the light to check the eggs. Mine take 3-4 days to hatch. I believe it depends on the temp of the water and the species. Remove fungused eggs or eggs which are completely white and opaque. Some add an antifungal, I haven't done that and have had no problems.