A 12" tall fish is still gonna need the tank to be proportionately much wider and longerHaha apparently none of you have fish 12" high
I consider 15' x 4' x 4' to be long, tall and wide...at least compared to an average tankA 12" tall fish is still gonna need the tank to be proportionately much wider and longer
unless it is a discus or angel, or perhaps something I don't know about