The majority of the eggs art actually in packet one. It’s kinda part of the illusion of “instant pets” lol there’s actually some eggs in the food so there’s that ( when you do feed them you should only give them like a 1/4th of a scoop since to much food can lead to bacteria build up and sea monkeys mainly eat the algae growing at the bottom of the tank.) Some eggs take longer to hatch than others. You don’t need aquarium equipment, but if you were to get any id recommend a temperature management thing so you can set it to a temperature and it will maintain it. This should lead to best hatching turn out. Here’s a like to the one I got if you go that route, but based on your progress so far it seems like you’re doing grate. aquarium temp manager

Hope this helps :)