insane
Member
I tried this 16x48x5 / 1728 =2.2
I must not understand
That would be 2.2 cubic feet of substrate. You have it right. A 5" sand bed is a DSB (Deep Sand Bed) and if you are going to have one of those you should research them thoroughly as they have special needs and precautions. I personally don't like an intank DSB as they take up alot of room and get ugly looking when seen from the side through the glass. They should also be layered correctly with different sizes of aragonite. Oolite is the finest and would go on the bottom. You work your way up in grain size for a DSB.
A 22lb bag is .26 cubic feet so you would need about eight 22lb bags for a 5" DSB.