yeah straight perlite, no pH, doesn’t hold nutes…it’s all on you hehehe
the smaller stuff is about 20$ for 4 cu. ft. at my local hydrow shop… i think the larger chunky pahroc is more like double that. the dusty shit is probably home-depot miracle grow or for seedling mixes i’d bet.
look for a materials yard if you can’t get to a hydro/grow-shop… kinda place that sells gravel & hauls with dumptrucks. i was getting 4cu ft bags from one for 15$ a year ago.
