Aww, you got a mustard gas! He is very very cute :0) I'm so happy that you finally got your Betta.

His anal fin looks a bit torn/infected with fin rot. That will definitely heal with plenty of clean water, and his huge tank! That will look so cool, with the albino Cories. You should get 1 albino, 1 panda, and 1 leopard that's my plan for a 20g female community.