 replacement for Tropical Sand?
I found this on the web. Anybody out there able to tell what these symboles mean? Will it work? Material Data Safety Sheet for Safe Sand
IDENTIFICATION AND USE
SECTION I Chemical Family: Inorganic Feldspathic Mineral
Composed of: Na20.Al203.6Si02·K20.Al203.6Si02· (Na,K)20.Al2032Si02
Uses: In the manufacture of container and sheet
glass, fibre glass insulation wool, ceramic
products, paint, plastic, rubber and scouring
powder. As filtration media in foundries and
for sandblasting.
SECTION II HAZARDOUS INGREDIENTS
Ingredients: None known.
No free Silica or Quartz
Approximate Concentration (%): Si02 = 0%
LD50: None known
LC50: None known
SECTION III PHYSICAL DATA
Physical State: Solid
Specific Gravity: 2.61
Odour and Appearance: Odourless, white granular or powder
Boiling Point (°C): 1500°C
Solubility in Water: Negligibie
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90 gallon, 20 gallon sump,skimmer,chiller,ro/di unit,calcium reactor,2-250w HQI 10000K, 2-96w 7100k,SPS,LPS,leathers,aqua equlizer | 
