Hey all i have never owned a giant but trust me i been starring at them since they arrived on the scene :reading what special requirements for care do they need space wise ect.ect.
I'd imagine the smaller variety giants would demand something like a 6-10 gal tank, and true seven inch ones mayby 10-20 gals..Yeeves would know, I think.
You can't get any 7 inch giant by the way. Mostly they are 2.7" to 3". 2 to10 gallon should work fine.
They just eat more than other bettas.Twice per day. Do alot of 100% water changing since they poop a lot. If you get from Thailand, you do need IAL. ^_^
yup I think I would like to have one too. They are really interesting