AsNoriuanswered grow question a day ago Depends on plant size and feeding frequency. With feeding every watering - you could easy get toxicity or at least be on verge of it. With every second watering with feed , aka with feed/plain/feed/plain schedule - 800 ppm could be not enough to get max out of plant.
I played a lot with soil and feeding schedules, so speak from my experience....
Your girl is healthy, but not big, maybe you could be in perfect spot with every second feeding plan ...