Sharnae Taylor-Smith

Hi everyone! I am wanting black sand. I have read conflicting opinions on here about collecting black sand from Muriwai, some using it with no issue others saying it's risky. can it be used? And if so how to I clean it. Will perimeters be changed? Does it leach anything? Again, reading conflicting answers on leeching. I currently stick community fish inc rams, tetras, kuhlis, corys, pleco & spiny eel in a 75L. If it's unsafe, where can I buy the blackest soft sand possible? Thanks!