Ive been using General Hydroponics flora trio, along with some additional bottles, armorsi, diamond nectar and koolbloom in flower (using the coco for cannabis feed chart). Ive read a lot of people use canna a&b im sure you could find feed charts others have had success with.
Other than nutes, i would suggest treating coco like hydroponics more than soil. Drip to waste is the method i use for watering, multiple fertigation events a day, ranging depending on container size. 3gal i hand watered 2x a day, 2gal is 4x and 1gal 6x during lights on flowering. Always feed calmg, always water with nutes (near end of flower, ill let you decide yourself what to believe on flushing).
Here is the coco for cannabis feed chart, created my dr.mjcoco. i in no way created this info. I follow it mostly, i dont use h2o2 or water wetter and i add hydrogaurd when using a multi day resivoir.
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