I also use canna but i also use Drip clean, From what i gather they run very similar lines i hear that the root excelerator equivilent to rizotonic is better, but the whole line of H&G compared to Canna is twice as much and doesnt produce anymore from the same grower then Canna would, most of the lines if used correctly will produce nice buds just up to the expeirence and the way the grower works his/her garden.