Originally Posted by ChoclateBetta
Would you reccomend them?
Definitely - They're excellent at cleaning up the bottom of the tank, and seem to get along great with the betta. The bio-footprint of these fish is relatively small - with 10 in a 8gal I haven't noticed a rise in nitrate levels.
They can be shy, and you should have enough hiding places that they can feel safe. Pygmy Corydoras are also very social, and shouldn't be kept in groups smaller than 6-8.
Overall, if you're looking for fun peaceful little bottom feeders - a school of Corydoras Pygmaeus is an excellent choice.
Edit / update: Over the last two weeks the cories have calmed down significantly - I see them mostly during feeding time but there's always one or two nosing around in the sand. Angelo has grown used to them and no longer appears stressed by their activity.