Hi, I'm rearing fireflies, and since they feed voraciously on snails, I'm trying to raise an aquatic snail in large enough numbers to sustain them...I have one from Arizona, family Lymnaeidae, and probably the genus Fossaria=Galba. Mature ones are doing real well on lettuce, and laying gobs and gobs of eggs. But they also eat their own eggs, so I've sequestered them in another aquarium......they hatch ok but don't take well to lettuce or other greens, and most, like 90%, die....so what would you recommend I try? I do add calcium....might the youngsters be algae feeders? Should I foster algal growth in their nursery till they are of age to join the bigger ones? Any suggestions would be appreciated...