silica sand and marine aquariums

[elegance coral]

For many years now I have thought that silica sand would lead to diatom infestations. It appears that I may be wrong about this. Can anyone explain to me how its safe to add silica sand to a reef tank?

[Billybeau1]

This article by Randy Holmes-Farley explains you question

Silica in the Reef Tank

http://advancedaquarist.com/issues/jan2003/feature.htm