Question about Substrates

[Green_Tree]

I'm looking into which substrate i want to get for my tank and i have a question. Ive heard that you want a fairly fine substrate so there is no chance of a sharp bit hurting the octopus. So i was curious. Anyone have any experience or opinions about a fine volcanic substrate?

 

[Nancy]

I've never encountered anyone using fine volcanic substrate. Aragonite sand has the advantag of helping keep the pH stable, and that's what we've been recommending.

Nancy

 

[Green_Tree]

Aside from the pH benefit. I was just curious as to the possibility of the volcanic sand harming the octopus?