Well, this guy from my work (Petsmart) found one of our Ice Blue Zebra cichlids that was carrying and he made her spit up the young. Now he didn't even want the young so instead of letting them die I've taken them home and they're in a 6gallon grow out tank with a sponge filter. The fry aren't even free swimming yet and all of them have their yolk sacs still attached. How long does it take the fry to fully consume the yolk sac and become free swimmers?