Gravel Substrate
· Multiple Copies/Sand/What Plant/Coils by Erik Olson < > Date: Tue, 18 Apr 1995/1996 > From: Eric Schoville <> > > Which type of sand should I use for my aquarium. There are three > types that I know of, Silica sand, Crushed coral or beach sand, and > the Play sand that they sell at hardware stores.