I can't find Estes ultra reef ceramic coated sand locally, and pricing for it online shipped is outrageous for 50-100lbs. Have any of you used Aqua Quartz grade 20 pool sand in your setups? Is it just silica sand? I'd much rather use ceramic coated sand like Estes ultra reef, but the pool sand is about an eigth the price. Is Aqua Quartz inert?
