It's hit it miss if they take, all about food and predators IMO. Gyp is good and let the sponges sit in the tank overnight, that's where all the little ones are.
As for the bottled ones, those are usually tisbe copepods..... They are great to start a refugium with and great food for the picky eaters.
I put 2400 in my tank on Wednesday, I bet they are all gone, my wrasses are having a hard time swimming! Sharks, sharks I tell ya!