Gravel for a 29 gallon tank by depth
| Depth | Gravel | Volume | Lb per gallon |
|---|---|---|---|
| 1 in | 22 lb | 6 qt | 0.75 |
| 1.5 in | 33 lb | 9 qt | 1.13 |
| 2 in | 44 lb | 12 qt | 1.51 |
| 3 in | 66 lb | 19 qt | 2.26 |
Footprint × depth, at 105 lb per cubic foot of dry gravel (Engineering ToolBox).
Aquarium Nexus recommends 1 to 2 inches of gravel, which it puts at about 1 to 2 pounds per gallon. For this tank, 1 to 2 inches works out to 0.75 to 1.51 lb per gallon.
Working it out
Pounds = length × width × depth (in) ÷ 1,728 × 105
The 30 × 12 inch footprint is 360 square inches. At 2 inches deep that is 720 cubic inches, or 0.42 cubic feet, which weighs about 44 lb. Sand and fine gravel weigh more per cubic foot; plant soils weigh less.
Common questions
How many pounds of gravel for a 29 gallon tank?
About 22 lb for 1 inch or 44 lb for 2 inches.
What are the dimensions of a 29 gallon tank?
30 × 12 × 18 inches for the standard size; brands vary slightly.
Sources
- https://topshelfaquatics.com/pages/aquarium-size-chart
- https://www.aquariumnexus.com/?p=2960
- https://www.engineeringtoolbox.com/dirt-mud-densities-d_1727.html