It would depend on what kind you're planning on keeping.
If you have a lot of fish, or even not the best place to buy fish food in the US is kensfish.com, I feed mine a mix of the vegetable flake and spirulina flake. They love it and it's a lot healthier than the store bought stuff. not to mention it's a ton cheaper and you get a HUGE amount. Just freeze all but a little bag.