How Much Gravel for a 20 Gallon Tank?

Assuming you are asking how much gravel is needed to fill a 20 gallon tank, the answer would be approximately 30 pounds.

If you’re wondering how much gravel you need for a 20 gallon tank, the answer is approximately 38 pounds. This will of course vary depending on the size and shape of your particular tank.

The best way to determine the amount of gravel needed is to simply do a trial run with whatever rocks or substrates you plan on using.

Place them in the tank and then fill it with water. Once you have an estimate of how much water yourtank can hold, you can calculate how many pounds of gravel you’ll need to purchase.

20 Pounds Aquarium Gravel

If you have an aquarium, you know that gravel is a necessary part of the ecosystem. But what kind of gravel should you use? There are many types and colors available, and it can be confusing to choose the right one for your fish.

One option is 20-pound aquarium gravel. This type of gravel is great for both fresh and saltwater tanks. It comes in a variety of colors, so you can find the perfect match for your fish and décor.

And because it’s heavier than other types of gravel, it won’t get stirred up as easily by your fish or filter. If you’re looking for an affordable and attractive option for your aquarium, 20-pound aquarium gravel may be the perfect choice for you!

How Many Gravel Bags Do I Need for a 20 Gallon Tank ?

A 20 gallon tank is a common size for both fresh and saltwater aquariums. The dimensions of a 20 gallon tank are: length – 24 inches, width – 12 inches, height – 16 inches. There are different types of gravel available for purchase, but the most common type used in freshwater tanks is aquarium-grade gravel.

A 20 gallon tank requires approximately 30 pounds or 14 kilograms of gravel.


If you have a 20 gallon tank, you’ll need about 0.5 cubic feet of gravel to fill it. That’s about 10 pounds of gravel.