The instructions on my can of Bonneville Brine shrimp eggs says that the ideal conditions for hatching are: salinity 28ppm (1 tbsp salt/liter H20), pH 8.5-9.0, sufficient aeration to keep eggs in suspension, temperature of 28C (24-30C range), illumination: two 60 watt fluorescent bulbs 20cm over hatchout tank. They also recommend sterilizing the equipment and water.