I have maybe 17-22 days left, it's Critical Mass.
I'll do a flush in 3 days, then another feeding on on Friday/Saturday. Then another flush and feed then a final flush or two just water.
I'm using General Hydroponic flush to waste in Pro-Mix HP (soiless)
PH 5.9 - 4ml Micro, 8ml Bloom, 5ml flora...