First off. I’ve been drinking.
Flush with appropriate pH water or tap water down to 1.6-1.8 ec. Then follow with a feed.
Depending on the medium it can take a lot of water. I’ve flushed with 100+ gallons to get mediums in range.
My longest day took 120 gallons of dechlorinated tap water. In 7 gal pots.
Welcome to the boxing ring.