i picked up a refugium on ebay its 24" x 12"x 14" (17.42g), it says rated for up to 150 gallons system and 400-500gph recommended water flow, i also picked up a Coral life 12" 2x18 watt light for the refugium. is that ok for the lighting? The live sand that i need can i get the at a pet store or should i buy the stuff on ebay for $26 for two full cups, whatever that means, he has great feedback on the stuff. thanks for all the help as soon as mu books show up i can read more and not have to bug you all with my questions