Gravel type - (Pea Gravel)Gravel form - (Regular Gravel)Gravel type - (Dolomite Gravel)

One the the first things you will have to take into consideration when setting up a brand-new fish tank is exactly how much gravel girlfriend will should add. The quantity of gravel you will require depends top top the watch you room trying to achieve, and also the type of fish and plants you setup on adding to her tank. If you desire to know exactly how much gravel friend will require for her tank, use the fish tank gravel calculator located above to discover the answer.

For most purposes, a gravel depth of 2 inches is sufficient for many fish tank setups. If girlfriend don’t arrangement on placing live tree in your tank you can obtain away with 1 customs of gravel or also less in some situations.


Planted Tanks


Planted tanks require a minimum that 2 customs of gravel in order for the plants to build a healthy root system. Bigger plants with much more extensive root solution will require much more substrate 보다 smaller much less deeply rooted species.

The type of gravel you pick for a planted tank is also another suggest to consider. Smaller gravel like pea gravel is much more suitable for a planted tank because it provides the tree roots an ext area to colonize. Larger gravel, top top the other hand, won’t provide the plants sufficient surface area because that its roots to organize onto, which can lead to poor nutrient absorption and sick poorly rooted plants.

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If you plan on including deep-rooted plants choose sword plants climate it is advisable to have a tank through a gravel depth of at least 4 inches. Larger hefty feeding tree may likewise require an added nutrient base under the gravel prefer fluorite aquarium substrate to reach their full potential. Any added nutritive substrate must be taken into account when calculating the lot of gravel girlfriend will must fill your tank.

Some plants prefer anacharis have tiny to no source system because they pull your nutrients right from the water, for this reason they just really require the gravel to organize them in place. For plants v minimal root systems, every you will should do is sink their crowns deep sufficient in the gravel so they don’t float away.



Unplanted Tanks


The minimum encourage gravel depth because that an unplanted tank is 1 inch. The amount and kind of gravel you include to one unplanted tank yes, really comes down to just how you want the fish tank to look when it is fully decorated. In some unplanted fish tanks, gravel could not also be necessary or wanted like in a breeder tank, or in a tank where you want to keep the debris and gathered waste to a minimum.

The only time one unplanted tank will require to have actually a depths gravel bed is if you setup on utilizing an undergravel filter. In that case, your tank will require to have a gravel depth the at least 2 inches for the under gravel filter to work properly. The reason for this is that the gravel acts together the filter media when you use an undergravel filter in her tank. In order to eliminate ammonia, nitrites, and debris native the tank you must have much more gravel to rise the amount of surface area because that the bacteria come colonize and for the debris to get trapped in.


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If girlfriend don’t arrangement on utilizing an undergravel filter climate the depth of the gravel in your fish tank is just dependent top top your an individual preference. Some people like the look at of an aquarium with a deep substrate even in an unplanted tank. When others favor to add just sufficient gravel to cover the bottom the the tank so the is just deep enough that there is no glass or acrylic showing.

Most decorations will job-related well on a shallow substrate because they usually have actually smooth level bases that won’t damage a tank. Large rocks, on the other hand, can have spicy edges that can crack or scratch a tank. If you setup on adding large rocks to your tank then having a depths aquarium substrate can assist protect the bottom of your tank from inadvertent scratches or cracks.

Table that Contents

Aquarium Gravel DepthHow much Substrate for a 20 Gallon Tank



How much Gravel because that a 10 Gallon Tank

Aqueon 10 gal LED Aquarium Kit (Click to buy in ~
DimensionsGravel: 1 in.Gravel: 2 in.
20 in together x 10 in W13 lbs26 lbs

Choosing the best amount the gravel because that a 10 gallon tank is relatively easy as soon as you know the tanks dimensions. Many ten gallon rectangular tanks space 20 inches long and 10 inch wide. Which means the surface area of the bottom the a ten-gallon tank is 200 square inches.

In order come cover 200 square inches v one inch of gravel, you will need a minimum the 13 pounds that gravel. If you favor to have a two-inch gravel class in a 10-gallon tank climate you will require 26 lbs of gravel.

A ten-gallon tank is a relatively small tank, therefore, you could want to stick v one inch of gravel. This will enable your fish to have much more room to swim roughly in, and also it will boost the volume of water friend can include to the tank. If on the other hand, you setup on including live plants through a deep source system, climate you should go v 2 inch of gravel also if that takes away a little tank space.



How much Gravel because that a 75 Gallon Aquarium

photo by: Jessa CC BY-ND 2.0
DimensionsGravel: 1 in.Gravel: 2 in.
48 in l x 18 in W56 lbs112 lbs

There is a many ground to cover in a 75-gallon aquarium when it come time to add the gravel. Many 75 gallon aquariums space 48 inch long and 18 customs wide. With a total surface area top top the bottom of the tank the 864 square inches.

To cover 864 square inches through one customs of gravel girlfriend will require at least 56 pounds of gravel to do the job. If you desire to have actually a 2-inch class of gravel you will need a minimum of 112 pounds that gravel to gain a layer that thick.

In many cases, a 2-inch great of gravel will look quite thin in a 75-gallon tank. Most people with big tanks like to have actually a substrate layer that is 3-4 inch deep to fill the end the tank. Which method you may need upwards that 224 pounds that gravel to obtain the look you desire in a 75 gallon aquarium.



How much Substrate for a 20 Gallon Tank


One that the most usual aquariums in the fish maintaining hobby is the 20 gallon tank. Due to the fact that it is such a famous tank volume it come in both long and also high configurations. The long and also high 20 gallon tanks have different dimensions, so we will address them separately so friend can gain a much better idea of just how much substrate they every need.


20 Gallon lengthy Tank


DimensionsGravel: 1 in.Gravel: 2 in.
30 in l x 12 in W23 lbs47 lbs

The 20 gallon long aquarium take away up much more floor room which way it will certainly require much more gravel 보다 a 20 gallon high tank. A 20 gallon long tank actions in at 30 inch long and 12 inches wide. Thus a 20 gallon long tank has a surface ar area the 360 square inches on the bottom of the tank.

If you want to cover 360 square inches through one inch of substrate you will require 23 pounds of gravel. To include a 2 customs layer of substrate friend will need 47 pounds that gravel to attain that depth.


20 Gallon High Tank

Aqueon LED Aquarium Kit (Click come Buy in ~
DimensionsGravel: 1 in.Gravel: 2 in.
24 in l x 12 in W19 lbs37 lbs

The 20 gallon high aquarium has actually a smaller as whole footprint, and also for that factor it is the more economical tank to buy gravel for. The most common size that a 20 gallon high tank is 24 inch long and also 12 inches wide. That way the surface ar area at the bottom the the tank is 288 square inches, which is 72 square inches much less than a 20 gallon long tank.

To sheathe 288 square inches v one customs of gravel girlfriend will need 19 pounds that gravel. In bespeak to have actually a 2 customs substrate layer, you will need 37 pounds the gravel. Together you have the right to see girlfriend can acquire away v a lot much less gravel in a 20 gallon high tank versus a 20 gallon lengthy tank for any kind of given depth that gravel you may require.



How lot Gravel because that a 55 Gallon Tank

Travis Lee CC by 2.0
DimensionsGravel: 1 in.Gravel: 2 in.
48 in together x 12 in W37 lbs74 lbs

A 55 gallon tank is just one of the an ext popular entry-level large aquariums ~ above the market because it provides a large volume without acquisition up a many floor space. A 55 gallon tank usually procedures in in ~ 48 customs long and 12 inch wide. As such the bottom of a 55 gallon tank has a surface ar area of 576 square inches.

If you desire to sheathe 576 square inches v 1 inch of gravel girlfriend will require 37 pounds of gravel. Come cover that exact same area with 2 customs of gravel girlfriend will need 74 pounds that gravel in order to fully cover that same amount that space.

Like most other large aquariums a 55 gallon tank might require a deeper gravel bed to have a filled the end look. Additionally if you arrangement on adding large live plants to a 55 gallon aquarium then you can want to include 3-4 inch of gravel to ensure your plants flourish in her tank. If you arrangement on including a 4 inch bed the gravel simply be mindful it will take 150 pounds that gravel to attain that gravel depth.



How lot Gravel for a 5 Gallon Tank

Aqueon 5 Gallon MiniBow LED Aquarium Kit (Click come Buy in ~
DimensionsGravel: 1 in.Gravel: 2 in.
16 in l x 8 in W8 lbs17 lbs

A 5 gallon tank is a small tank that won’t require much gravel as soon as it come time to obtain it up and running. Many 5 gallon tanks top top the sector measure in at 16 inch long and also 8 inch wide. Which way they have actually a fairly small footprint of 128 square inches.

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In order to cover 128 square inches with 1 inch of gravel, you will certainly only need 8 pounds of gravel. If you choose to have actually a gravel depth the 2 inches climate you will need 17 pounds that gravel.