First time grower having trouble with how much to feed, and how often.

First grow. How much feed, when? Canna nutes 5x5 Ionframe Evo 8. Cups into 1 gal into 5 gal (Should i transplant once more between 1&5?) Canna has fancy calc on website. Do i feed recommendation every watering? Is "tanksize" referring to pot size or reservoir? (Im hand watering).