How much sand?

[maleks.reef]

Hello, i was wondering how much sand would i need for apprx 1.5 to 2 inches of sand in my RSM c 130 tank? Would a 20lbs bag be enough? Thanks.

Dimensions: 510 x 484 x 584 mm (20” x 19” x 23”) (Height x Width x Length)

Heres a pic of the tank

 

[DC Reefer]

If you look at sand on the BRS website they have guides like below for each type of sand to help determine how much you need based on tank size. bahamas-oolite-arag-alive-live-reef-sand.html