Welcome aboard bud! Do you use canna coco or canna soil?
I don't use much in the way of additives outside the base nutrients and a bit of PK 13/14. I've heard some good things about canna boost though, did you find it gave a noticeable increase it metabolic function? From what I understand, canna boost works by promoting the plant health and increasing internal biology, it seems like a good idea, although I've not had much of a desire to try it. Being a small scale commercial grower, once i find something that works, i'm pretty reluctant to change things