NLS food will store/last up to 5 years when it's NOT opened.
That info is directly from the Neil of Cichlid Food Canada
Once opened just keep the container in a cool/dark area away from sunlight.
- The only reason certain products disappear from the retail store shelves is lack of sales.
NLS products might have been removed because their products a slightly more expensive that the cheaper brands.
Why spend $6 on a container of pellets when you can get similar looking but INFERIOR pellets from Tetra/Wardleys for $2?
Most people don't know & don't care. A fish to them, is just a fish.
Like these Hikari BioPure... They used to be available everywhere, but hardly any stores carry them now. They just wouldn't sell as fast as the lower quality foods.