Water Soluble Calcium Source Promotes Good Egg Shell Formation Aids Skeletal Development Help Prevent Egg-Binding To treat & Prevent Calcium Deficiency Calci-Lux is a high quality, water soluble source of calcium. It is a dietary supplement that is administered for good egg shell formation, good skeletal development in young birds, during the breeding season to help prevent egg-binding and also in cases of calcium deficiency or calcium tetany.