I use this, very cheap, a bit weird when washing it, but totally safe. Bottom dwellers fine with it, mbuna moved mouthfuls of it, all good. Plants grow in it, too.
It is sand blasting grit/sand.
♡ Forever Farms Babydoll Southdown Sheep ♡
Last edited by secuono; 07-06-2012 at 12:48 AM.