I have some I bought back in 2015 maybe 2016, but it never came with a date on it , it’s been stored what I would call properly and looks the same as day 1 , but for the sake of a cheap product is it just better then sorry to replace it ??
Wish I could help on that one, I had a container of reef frenzy I tossed as there must have been some moisture got in, was strange looking, oddly satisfying...lol
I can't imagine that it goes bad, especially if it's been sealed or at least closed. These are sticks, I think if it's bad they just wouldn't eat them.