Bettawolf: You can thaw out one cube and keep it in the fridge for two or three days, that's what I do. Most of it gets used up by then, although I do end up wasting some. Sometimes, if you're lucky, you can find brine shrimp packaged already in a big sheet instead of cubes, too. I got bloodworms like that. I smash it with a hammer and take out several small pieces, whatever I need, and thaw them, then keep them in the fridge.
Pitluvs, thank you, that is all I need to know.
Neons it is. I'll save the rummynoses for that glorious day when I have a much bigger tank.