I gave them silica yesterday funnily enough ((Rhino Skin- i bought it cos it was on sale) , id love to show a pic today, they are much bigger & healthier looking, maybe the silica, maybe that I amended the ph up to 6- 6.1 for Mg absorption.
Haha, ye, I could watch that vid all day on a loop

smoke in hand

I have a biobizz

hat, my shop always gives me freebies , but have not tried the notes,- do they have grow a&b + bloom a&b? With canna coco it's just cpco a&b and i've noticed I need to watch for def of N / Mg in veg, and toxicity of N, P shortage in bloom. I have all the canna stuff but was thinking of switching nutes or growing photoperiods cos i'm not getting the yields I want. I can't switch till I use em up, and canna ain't too bad- they do a lot of research & development.
Both me girls are looking lovely & green , hope yours are too. The little one today is the size of the big one yesterday . Their names are bonita y precioca.
Got a 10ltr bag of perlite for about 8euro delivered. Not heard of quartz in growing context but if it works, go for it.