Ok, let me address the air pump issue. These dishes, from what I know, are nearly identical to the ones from Brine shrimp direct. The instructions on this dishes says you need an air pump but this is not true. Both dishes from Brine shrimp direct and these have a nipple for an airline but I don't think either of them needs it. Brine shrimps hatch and travel through a maze following the light. I don't see why an airline would be needed.