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

One of the an initial things friend will have actually to think about when setup up a new fish tank is just how much gravel girlfriend will should add. The quantity of gravel friend will need depends top top the look you room trying come achieve, and the kinds of fish and plants you arrangement on including to her tank. If you want to know exactly how much gravel girlfriend will need for her tank, use the fish tank gravel calculator located over to find the answer.

For many purposes, a gravel depth that 2 customs is sufficient for most fish tank setups. If friend don’t arrangement on putting live tree in her tank girlfriend can gain away with 1 inch of gravel or also less in part situations.


Planted Tanks


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

The kind of gravel you choose for a planted tank is additionally another point to consider. Smaller sized gravel prefer pea gravel is an ext suitable for a planted tank since it provides the tree roots more area come colonize. Bigger gravel, top top the other hand, won’t provide the plants enough surface area because that its root to organize onto, which deserve to lead to negative nutrient absorption and also sick poorly rooted plants.

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If you arrangement on including deep-rooted plants prefer sword plants climate it is recipient to have a tank through a gravel depth the at least 4 inches. Larger hefty feeding plants may likewise require an included nutrient base under the gravel prefer fluorite aquarium substrate to with their full potential. Any additional nutritive substrate must be taken right into account as soon as calculating the amount of gravel friend will have to fill her tank.

Some plants like anacharis have tiny to no root system since they pull your nutrients straight from the water, therefore they only really need the gravel to organize them in place. Because that plants with minimal source systems, every you will need to do is sink their crowns deep sufficient in the gravel for this reason they don’t float away.



Unplanted Tanks


The minimum encourage gravel depth because that an unplanted tank is 1 inch. The quantity and kind of gravel you add to an unplanted tank yes, really comes under to just how you want the fish tank come look when it is fully decorated. In part unplanted fish tanks, gravel can not even be necessary or desired like in a breeder tank, or in a tank wherein you want to save the debris and built up waste to a minimum.

The just time one unplanted tank will need to have a deeper gravel bed is if you setup on utilizing an undergravel filter. In that case, her tank will require to have actually a gravel depth that at the very least 2 inches because that the under gravel filter to work properly. The reason for this is that the gravel acts as the filter media when you use an undergravel filter in her tank. In order to remove ammonia, nitrites, and debris native the tank you have to have more gravel to rise the quantity of surface ar area because that the bacteria to colonize and for the debris to get trapped in.


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If friend don’t setup 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 of one aquarium v a deep substrate even in an unplanted tank. While others prefer to add just enough gravel to cover the bottom the the tank so the is just deep sufficient that there is no glass or acrylic showing.

Most decorations will job-related well on a shallow substrate since they usually have actually smooth level bases the won’t damages a tank. Huge rocks, top top the other hand, have the right to have spicy edges that have the right to crack or scrape a tank. If you arrangement on adding big rocks to your tank then having actually a depths aquarium substrate can help protect the bottom of her tank indigenous inadvertent scratches or cracks.

Table that Contents

Aquarium Gravel DepthHow lot Substrate because that a 20 Gallon Tank



How much Gravel because that a 10 Gallon Tank

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

Choosing the appropriate amount the gravel for a 10 gallon tank is relatively easy once you recognize the tanks dimensions. Most ten gallon rectangle-shaped tanks are 20 inch long and also 10 customs wide. Which method the surface ar area the the bottom the a ten-gallon tank is 200 square inches.

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

A ten-gallon tank is a relatively small tank, therefore, you might want come stick with one customs of gravel. This will enable your fish to have an ext room come swim roughly in, and it will increase the volume the water you can add to the tank. If on the various other hand, you arrangement on including live plants with a deep root system, then you should go through 2 inch of gravel even if the takes far a small tank space.



How lot 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 come cover in a 75-gallon aquarium once it comes time to add the gravel. Most 75 gallon aquariums room 48 inches long and also 18 customs wide. V a full surface area on the bottom that the tank the 864 square inches.

To sheathe 864 square inches with one inch of gravel girlfriend will need at the very least 56 pounds that gravel to carry out the job. If you want to have a 2-inch layer of gravel friend will need a minimum the 112 pounds that gravel to acquire a layer that thick.

In most cases, a 2-inch class of gravel will certainly look fairly thin in a 75-gallon tank. Most world with large tanks prefer to have actually a substrate layer that is 3-4 inch deep to fill the end the tank. Which method you may need upwards of 224 pounds that gravel to acquire the look girlfriend desire in a 75 gallon aquarium.



How lot Substrate because that a 20 Gallon Tank


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


20 Gallon long Tank


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

The 20 gallon lengthy 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 steps in at 30 inch long and 12 inch wide. Because of this a 20 gallon lengthy tank has a surface area that 360 square inch on the bottom of the tank.

If you want to covering 360 square inches v one customs of substrate girlfriend will need 23 pounds that gravel. To add a 2 customs layer that substrate friend will need 47 pounds of gravel to accomplish that depth.


20 Gallon High Tank

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

The 20 gallon high aquarium has actually a smaller in its entirety footprint, and also for that reason it is the an ext economical tank to buy gravel for. The most typical size of a 20 gallon high tank is 24 inch long and 12 inch wide. That means the surface ar area at the bottom that the tank is 288 square inches, i beg your pardon is 72 square inches less than a 20 gallon lengthy tank.

To sheathe 288 square inches with one customs of gravel friend will require 19 pounds that gravel. In stimulate to have a 2 inch substrate layer, girlfriend will need 37 pounds that gravel. Together you can see girlfriend can gain away v a lot much less gravel in a 20 gallon high tank versus a 20 gallon lengthy tank for any type of given depth the 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 among the an ext popular entry-level huge aquariums ~ above the market because it offers a huge volume without acquisition up a lot of floor space. A 55 gallon tank usually measures in at 48 customs long and 12 inch wide. As such the bottom of a 55 gallon tank has actually a surface area of 576 square inches.

If you want to sheathe 576 square inches v 1 inch of gravel you will require 37 pounds the gravel. Come cover that very same area v 2 customs of gravel friend will require 74 pounds the gravel in stimulate to fully cover that very same amount that space.

Like most other huge aquariums a 55 gallon tank may require a deeper gravel bed to have actually a filled the end look. Additionally if you plan on adding big live plants to a 55 gallon aquarium climate you can want to include 3-4 inch of gravel come ensure her plants prosper in her tank. If you setup on including a 4 inch bed the gravel simply be mindful it will take 150 pounds of gravel to accomplish that gravel depth.



How much Gravel for a 5 Gallon Tank

Aqueon 5 Gallon MiniBow LED Aquarium Kit (Click to Buy at
DimensionsGravel: 1 in.Gravel: 2 in.
16 in together x 8 in W8 lbs17 lbs

A 5 gallon tank is a tiny tank the won’t require lot gravel as soon as it come time to acquire it up and also running. Many 5 gallon tanks on the industry measure in in ~ 16 inch long and 8 inch wide. Which method they have a fairly small footprint the 128 square inches.

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