Just my opinion, and alot of local betta breeders, but liquifry is not that good for feeding fry. It is better for feeding infusoria and it will cause your water to cloud up. It is nothing more that the egg yolk bettaman told you to use. I would stick with that, but remove the remains after feedings so it doesn't foul the water. Some have found that liquifry will actually kill off your spawn. Some people will add it to a tank a few days ahead of time along with live plants so that the infusoria the plants create for the fry, can fed on it.