10/10/18. Got a solid measure on it when it was in my transfer tub a few days ago at 17". Pretty wild to see how much it has grown since 08/20/17. It was the size of my finger.
Quick update during waterchange (11/14/18). The larger gars are about 20"-22" for reference.
Got my old 6x2.5 setup coming back up for the afrowana soon!!