I used 100 lbs for my 150gal. african tank, 5'x2' footprint, gave me about 2"-2 1/2"
add enough to make yourself happy.(I'd keep it 3" or less myself ) Sand rocks, I love it. To prevent rock piles from falling, place the bottom of the piles/stacks ON THE AQUARIUM BOTTOM so the fish don't dig a sinkhole under your rockpile foundation. Have fun!
add enough to make yourself happy.(I'd keep it 3" or less myself ) Sand rocks, I love it. To prevent rock piles from falling, place the bottom of the piles/stacks ON THE AQUARIUM BOTTOM so the fish don't dig a sinkhole under your rockpile foundation. Have fun!