Silicates are blamed for many things in the marine aquarium.
I just read, “Brown algae feeds on silicates!” on a web site.
Admonitions abound against using normal sand instead of sand composed of dead coral.
I don’t know of silicone combining with other elements.
Is the silicone in sand lying in wait to pounce on some other element or a compound and wreak havoc in my aquarium?