Sounds cool.
I have never tried "V" and no idea what it looks like and what the method is.
I just had some perlite sometimes mixed in with potting mix and sand.
But pure "V" for seed germination... this I need to try.
I am disappointed ... I had some carnivorous seeds and sown in some mix I made and after I saw many tiny sprouts, at a later-on check, most were gone, only one left. And I could see some small worms, really tiny and see-through. Maybe they were hungry... Maybe "V" is not a medium these worms will call HOME.
:)