I hesitate to turn this into another "food" thread, but it seems like an appropriate place to insert this: If a person who shall remain nameless were so cheap that he only purchased fish food in large economy-size containers, and then subdivided each one into smaller portions which were then vacuum-sealed in individual pouches and only opened as required, there seems to be no readily apparent problem with the odour, colour or palatability of this food even a year or two down the line.
I use...oops, sorry, I meant to say "this person" uses...a lot of different foods in rotation, and doesn't really keep huge numbers of fish at one time so food can be sitting for easily a year or two before the last pouch is used up.
If someone decides to follow my...
this person's...example, it's a good idea to place a strip of filter floss in the pouch along the inside of the edge that is actually heat sealed. Failing to do this allows tiny fragments of food, especially flake food, to get sucked into the pump on the vacuum sealer and bung it up.
When that happens, my...
this person's...wife becomes unhappy and trouble ensues.