How much nute burn is acceptable?

[Mollisol]

Those leaves look fine to me.

[12HourPower]

Day 20 of flower. Feeding only once a week, watering as needed
Per 4L:
3 mL Cal mag+
6 mL flora micro
12 mL flora bloom
Silica to adjust pH up to 6.5 (usually about 1/4 the amount of bloom, 3 mL)

500 mL per 3 gallon bag. I don't ever get run off, I pour very slowly. Same with water.

Anyone following my posts knows last week was stressful. This week I cut the micro and bloom down by 50% and fed the same volume.

Think we need a flush? Or is reduced amounts enough to keep it in check?