As much as I've enjoyed watching all of your brains ticking- this is one of those topics that folks just never can agree on and never will. But, if we go back to the orignal topic *ahem* those tiny disco bowls are ridiculous. I can hear the bettas now "aaah,aaah,aaah,I'm barely staying alive,barely staying alive"
But you said if a person THINKS that their fish is happy than it is. And that's not true.