Its normal... i have 3 x 2ft tanks (along with a few smaller tanks along the way), all running with fishes and i'm still not able to use up a small container of NLS micro pellets before it expires, so what i did was just repack portions into small zip-lock bags and passed them to friends (and even they can't even finish using up the small packs either).
I guess the alternative is to just buy the smallest container of food with the longest expiry date.
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