I use about two dozen frozen foods in rotation and none last more than a couple of months. NLS pellets are gone in about a month. But, I'm feeding 1000g worth of fish across 4 tanks. If you're finding that your dried foods are last more than 6-9 months, time to buy smaller cans. On frozen, if you're still looking to provide a "mix" of foods in a smaller tank, it may be better to make your own. Or, you can look into the "Saltwater Multipack" from SFBB. The squid, though, may not be taken so readily by smaller fishes, and there's a lot of Artemia in the mix. The smaller packs of the frozen ON "formula" foods might be a better option there.