Hempy Grow questions

Hello, So I am going to do my first Hempy bucket grow and i have a couple questions. I am using Canna coco with all canna nutrients. When watering do you feed the plant nutrients every time ? Do you ever have to flush all the grow medium ?

the guys on world of hempy will sort you out dude..

https://www.rollitup.org/hydroponics-aeroponics/546006-world-hempy.html