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

One that the an initial things girlfriend will have to take into consideration when setting up a new fish tank is exactly how much gravel friend will must add. The lot of gravel friend will need depends ~ above the look you room trying come achieve, and the type of fish and plants you plan on adding to her tank. If you desire to know 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 of 2 customs is sufficient for many fish tank setups. If you don’t arrangement on placing live plants in her tank girlfriend can obtain away through 1 inch of gravel or even less in some situations.


Planted Tanks


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

The kind of gravel you pick for a planted tank is likewise another suggest to consider. Smaller gravel like pea gravel is much more suitable for a planted tank since it offers the plants roots much more area come colonize. Larger gravel, on the other hand, won’t provide the plants sufficient surface area because that its root to organize onto, which deserve to lead to poor nutrient absorption and also sick poorly rooted plants.

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If you plan on adding deep-rooted plants favor sword plants then it is advisable to have actually a tank through a gravel depth that at the very least 4 inches. Larger heavy feeding tree may likewise require an included nutrient basic under the gravel favor fluorite aquarium substrate to with their full potential. Any added nutritive substrate must be taken right into account when calculating the quantity of gravel girlfriend will need to fill your tank.

Some plants favor anacharis have tiny to no root system due to the fact that they pull their nutrients right from the water, for this reason they just really need the gravel to organize them in place. For plants with minimal root systems, all you will must 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 include to an unplanted tank yes, really comes down to how you desire the fish tank to look as soon as it is completely decorated. In some unplanted fish tanks, gravel might not also be crucial or desired like in a breeder tank, or in a tank whereby you want to store the debris and gathered waste come a minimum.

The only time one unplanted tank will require to have a depth gravel bed is if you setup on utilizing an undergravel filter. In that case, your tank will require to have actually a gravel depth of at least 2 inches for the under gravel filter to occupational properly. The reason for this is the the gravel acts as the filter media as soon as you usage an undergravel filter in your tank. In order to remove ammonia, nitrites, and debris from the tank you should have an ext gravel to increase the amount of surface area because that the bacteria come colonize and for the debris to get trapped in.


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If you don’t plan on making use of an undergravel filter climate the depth that the gravel in your fish tank is only dependent ~ above your an individual preference. Some people like the watch of an aquarium with a deep substrate also in an unplanted tank. If others prefer to add just sufficient gravel come cover the bottom of the tank so it is just deep enough that over there is no glass or acrylic showing.

Most decorations will occupational well top top a shallow substrate because they usually have smooth flat bases that won’t damage a tank. Huge rocks, ~ above the various other hand, can have spicy edges that can crack or scrape a tank. If you setup on adding large rocks to her tank then having actually a deeper aquarium substrate can aid protect the bottom of your tank native inadvertent scratches or cracks.

Table of Contents

Aquarium Gravel DepthHow much Substrate because that a 20 Gallon Tank



How much Gravel because that a 10 Gallon Tank

Aqueon 10 festival LED Aquarium Kit (Click come buy at
DimensionsGravel: 1 in.Gravel: 2 in.
20 in l x 10 in W13 lbs26 lbs

Choosing the appropriate amount that gravel because that a 10 gallon tank is fairly easy once you understand the tanks dimensions. Most ten gallon rectangle-shaped tanks room 20 inch long and 10 inch wide. Which means the surface ar area of the bottom of a ten-gallon tank is 200 square inches.

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

A ten-gallon tank is a relatively small tank, therefore, you might want to stick with one inch of gravel. This will enable your fish to have an ext room come swim around in, and also it will rise the volume of water friend can include to the tank. If ~ above the various other hand, you arrangement on including live plants through a deep root system, climate you must go through 2 inches of gravel even if it takes away a little tank space.



How much Gravel for 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 lot of ground to cover in a 75-gallon aquarium when it come time to add the gravel. Most 75 gallon aquariums space 48 inches long and 18 inch wide. Through a complete surface area on the bottom the the tank of 864 square inches.

To covering 864 square inches through one customs of gravel you will need at least 56 pounds the gravel to perform the job. If you desire to have a 2-inch layer of gravel friend will require a minimum that 112 pounds of gravel to obtain a layer the thick.

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



How lot Substrate for a 20 Gallon Tank


One of the most usual aquariums in the fish keeping hobby is the 20 gallon tank. Due to the fact that it is together a renowned tank volume it come in both long and also high configurations. The long and also high 20 gallon tanks have various dimensions, so we will resolve them individually so friend can gain a 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 lengthy aquarium bring away up much more floor space which way it will certainly require more gravel 보다 a 20 gallon high tank. A 20 gallon long tank actions in at 30 inch long and 12 inch wide. Thus a 20 gallon lengthy tank has a surface area of 360 square inch on the bottom the the tank.

If you desire to sheathe 360 square inches v one customs of substrate friend will require 23 pounds that gravel. To include a 2 customs layer of substrate friend will require 47 pounds the gravel to accomplish that depth.


20 Gallon High Tank

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

The 20 gallon high aquarium has actually a smaller all at once footprint, and also for that factor it is the more economical tank come buy gravel for. The most typical size the a 20 gallon high tank is 24 inch long and also 12 inch wide. That means the surface ar area at the bottom that the tank is 288 square inches, which is 72 square inches less than a 20 gallon lengthy tank.

To cover 288 square inches with one customs of gravel girlfriend will need 19 pounds of gravel. In order to have actually a 2 inch substrate layer, girlfriend will require 37 pounds of gravel. As you have the right to see you can acquire away with a lot much less gravel in a 20 gallon high tank versus a 20 gallon lengthy tank for any given depth that gravel you might require.



How lot Gravel for 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 one of the an ext popular entry-level large aquariums on the market since it gives a large volume without acquisition up a the majority of floor space. A 55 gallon tank usually procedures in at 48 inches long and 12 inch wide. As such the bottom that a 55 gallon tank has a surface ar area that 576 square inches.

If you want to covering 576 square inches through 1 inch of gravel friend will need 37 pounds that gravel. To cover that exact same area v 2 inches of gravel you will require 74 pounds of gravel in stimulate to fully cover that very same amount of 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 big live tree to a 55 gallon aquarium climate you could want to include 3-4 inches of gravel come ensure her plants flourish in her tank. If you arrangement on adding a 4 customs bed the gravel simply be mindful it will certainly take 150 pounds that gravel to achieve that gravel depth.



How lot 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 that won’t require much gravel as soon as it come time to get it up and running. Many 5 gallon tanks ~ above the market measure in in ~ 16 inches long and also 8 inch wide. Which way they have a reasonably small footprint of 128 square inches.

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