Wait, where was the top of the liquid?
An inch from the top of the growler itself, or an inch from where the growler starts to taper in?
A better question, how big was your starter? volume and gravity.
Ive always made a 1L 1.040 starter in a 2L flask on a stir plate and never had krausen rise above the 1.25L mark.
At least you know you'll have a nice fermentation when you pitch