Hi & welcome to the forum...Many websites suggest mixing no more than 10 fish together in a 10 gallon, while aqua advisor says it's perfectly fine for me to house 10 ember tetra, 10 Pygmy corys and 10 shrimp in the same tank, which seems like it would be overstocked.
If you'll surf on the internet, don't be surprised if you'll read conflicting remarks. So many people, so many opinions...