Stocking Question

[K4sie]

I have a 10 gallon (filter, sand, airstone, decorations) I currently have 4 leopard cories and was wondering if I could add a betta or better yet if I could have 6 leopards and a betta

 

[Ninjouzata]

I'd re-home your leopards or get a larger tank for them. The leopards would be best in a tank around 20g.
I would not put a betta with them as their max temp is 75F and bettas minimum temp is 78F.
 
HERE is more info on the leopard cories, and HERE is a good article on bettas.
 
Please do post pics of them if you have any, they seem lovely!