Originally Posted by Tigris
Can you give some examples of medium size rasboras? I'm assuming you aren't talking about harlequin rasboras.
Can you think of some cories that stay the same size has the green ones?
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Yes, I was thinking of the 3 species in Trigonstigma. And there are a couple others in the profiles I think. The "dwarf" species are very tiny, such as those in Boraras, and might get eaten.
For green cory, do you have Corydoras aeneus or Brochis splendens? Both are in our profiles [click shaded names, that is a link to the profile] with photos and it mentions how to tell them apart. They are very similar in colour/pattern. This makes a bit of a difference, as Brochis get a bit larger. But they are closely related and get along together, as do any species in both genera. We have many species in our profiles.