AsNoriuanswered grow question a year ago Soil is more than nutritions. Its a living creature, what you did with overfeeding and later with flushes is not for soil grows. First, second run, it dont matter.
Most of people dont reuse soil.
There is new brands orientated to sustainability, but you still need time to downgrade roots, you just cant jump from one plant to other in same pot or si. It will never work.
You want to know what you load and count, use coco.