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For a fish tank, you need enough gravel to make a thin layer on the bottom of the aquarium. For an outdoor walkway, you need much more.
slugs need rocks,branches,moss,soil and gravel.(fish gravel will do)
1 square km of gravel
1 cement 2 sand 3 gravel
You will need 0.309 cubic yards (about 600 pounds) of gravel.
Can't answer unless we know the depth of the gravel and width of the area.
You will need about 3.7 cubic yards (around 4.75 tons) of gravel.
with a good enoungh filter and some speicies of loach u should not need to change gravel they also sell vacuums that can clean food and algae out of gravel. hope I helped <3
You would need about 13 cu yards or about 15 tons.
about 71 cubic metres of gravel i think
Nor sure how pee gravel is packed, but you need enough for 64 cubic feet.
You will need 65.93 cubic yards or 84.6 tons of gravel.