If you're growing in coco coir during the flowering stage and feeding at 700–800 ppm, you're within a safe range, but you could increase the concentration slightly if there are no signs of excess, such as burnt tips or leaf damage. Raise ppm during bloom to around 900–1100 ppm to support better flower development, always monitoring how the plant responds. If the plants look healthy and show no signs of overfeeding, increasing the ppm a bit can help maximize floral growth without issues.