Getting rockwool packs devlivered by the post office guy or getting it myself and driving it around, annoys me. So far I fill my flood table with the small rockwool cubes.
I am looking now for a medium that I can reuse without too much effort.
I have an electrical sauna where I can put the pebbles. Then ramp the sauna up to 90 C (194F) to 100C (212 F).
What you think about that?
How often can I reuse the clay pebbles? Will they degrade?
I would not feel comfortable if I need to throw the pebbles in my garden. Rockwool blends more nicely in the garden soil.