I’ve set up, cleaned and leak tested a new 25 lagoon build.

I need dry shelf rock, I’ve called 4 shops in SD. Two no one answers the phones nor has any sort of voice mail out the other two, one doesn’t have shelf rock and the other barely knew what it is but said they have something “like it”.

So thought I’d ask here if anyone know of a local place that has it before I order from BRS.

Thanks for your help !