Yeahhh...breeding brine shrimp is not worth it at all for your oscars or silver dollars. First of all, the silver dollars are mainly herbivores so they really need to be eating a veggie-based diet like a spirulina flake or pellet supplemented with fresh veggies. Oscars will certainly eat brine shrimp, but considering my 5" Jack Dempsey can annihilate a cube of frozen brine shrimp in a matter of seconds, you'd have to commit brine shrimp genocide in order to even make a light snack for a full grown oscar.
If you want to feed live feeders, just get something like a 29g and stuff it full of platies. They're pretty, they're entertaining, and they breed like crazy.
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