Corys are supposed to be schooling fish aren't they? I have 4 adult sized Panda Corys in my tank, and they never hang out together. Is there something missing? I realise 4 isn't enough, but my lfs didn't have any more. They're about 5cm long, the first ones I had were only 2 cm max, 3 were doa and the other 2 died shortly after acclimation so the lfs sent me some replacements but they don't seem to care about each other. They're happy sitting on the sand and digging around, but never really hang out. Is there something I can do to make them happier?