I have 3 albino cories which are great, I always thought they would be boring fish because when you see them in shops they don't seem to move but when you get them home they are mental. I am going to get 3 more cories tomorrow and just wanted to check which ones I should get. Do I have to get Bronze cories or can I get another type? I have a sand base and my temperature is about 77f, thanks for any help in advance.