you can go to home depo n get bahamma olite sand its dry comes in 20lb bags for about 3.00 dollars a bag .the same sand you buy in 20lb bags live at your fish store.But its not 25 a bag set ur self up.I used 2000lbs of it in my sump that was 8ftx4ft 3fth Sand bed was 1ft high an over700gal sump the tank was a 265 never had any problems at all