Hello, I am new to this forum and also new to beta fish. I bought this fish last night and put him in a 2.5gal tank and he was verry happy. Today I bought a 10gal tank so I can put some other fish in with him, but he got real mad after I put him in the bigger tank so I put him back in the 2.5gal, here are some vidcaps of him in the 2.5 after I put him back. Does anyone know what got him so mad?