What Can I Do With Old Fish Tank Gravel?

Aquarium gravel functions as well as a decorative feature in landscapes. Some aquarium gravel is pea gravel, which is the same type of stone that is sometimes used in landscaping.

What can I do with old fish tank gravel? Aquarium gravel will work in the same manner as landscaping gravel in borders, mulching, paths, and paving. If you’ve got a little or a lot to deal with, use aquarium gravel to brighten up your outdoor room.

The old fish tank gravels are not the only things you can reuse, but the fish tank itself, too! Read this article and know how to be more environmentally-friendly by reusing old fish tank gravels and fish tanks.


If you have a lot of aquarium gravel, you can use it to build a road. If you like this idea but don’t have enough aquarium gravel for the whole route, you can mix it with sand or gravel.

To make a path, dig the soil a few inches deep. Depending on the soil type in your field, you will need to put down a layer of the stone pack in front of the landscaping fabric below the pathway’s gravel.

Make sure you line the route with rocks, larger stones, or other edging to hold the gravel in place.

Assessing How Much Gravel For A Concrete Walkway

Concrete walkway, a long-lasting project to separate two areas into a lawn or act as an avenue from one area to another.

After digging the walkway, dump gravel onto the trench’s bottom and pack it closely to the earth to form an immovable foundation for the asphalt to stick to.

Measurements and accurate measurements will help you calculate the gravel volume required for your project in either cubic yards or tons.

  1. Mark the outline of your walkway on your lawn with the paint coloring of the lawn.

  2. Dig right down on the line of paint with a spade to hack the lawn.

  3. Remove grass from the field and dig the soil at a depth of 6 inches from the ground surface. This leaves a depth of 2-inch for gravel and a depth of 4-inch for concrete.

  4. To calculate the square footage, weigh the length and width of the walkway. Multiply the length by the distance. For example, a walkway 3 feet wide and 40 feet long is 120 square feet.

  5. Convert the square footage to cubic shoulders, then cubic shoulders. Divide the 2-inch depth by 12 to 0.17. 0.17 x square feet. For eg, 120 x 0.17 = 20.4 cubic feet. Divide the cubic legs by 27 to receive the cubic legs. For example, 20.4 divided by 27 = .76 cubic meters of gravel for a 3-by-40-foot walkway.

  6. Convert cubic yards to tons if you buy gravel from a firm that sells it in tons. A cubic yard of gravel weighs 2,700 pounds. One ton is worth 2,000 pounds. Then, divide 2,750 by 2,000 to get 1 3/8 per ton of weight. Multiply the cubic yards by 1 3/8 or 1,375 in decimal form to achieve the gravel volume required in tons. For eg, 1.76 X 1.375 = 1.045 tons required for this project.


  • Attach about 10% extra to the final number of tons or cubic yards to allocate extra material for imprecision in the calculation and leveling of the land.
  • Tamp the gravel in the road to a depth of 2-inch before applying the asphalt.

Potted Plants

Aquarium gravel, particularly colorful varieties, will brighten container plants when sprinkled on the soil’s top layer. In more practical uses, aquarium gravel may be used for irrigation at the plant containers’ bottom.

Usually, 1 inch of gravel is what you need to drain properly. Adding gravel to the bottom of the pots often adds weight, keeping light plastic containers from falling over.


Aquarium gravel may be combined with mortar or used on its own as a cauldron when paving patios or paths.

The gravel may be tapped between the pavers when used without mortar or pushed into the pavers’ gaps when the mortar is already damp.

Garden Borders

Aquarium gravel may be used to describe garden sections as well as mulched or paved fields.

Gravel serves as a visual boundary that can keep grass, flowers, and other plants from outside the fence. Dig a 2-to 3-inch trench with a gravel boundary and line it with a drainage cloth.

Stop using gravel around a lawn because it makes mowing tough since the stones can be thrown, or the blades of the mower can be destroyed.

Soil Aeration And Mulching

Mix aquarium gravel with topsoil to aerate to provide a rockier layer for plants such as rosemary or lavender bushes.

You may also use aquarium gravel as a mulch as a top cover for planting. Aquarium gravel mulch fits well around shrubs and in rock gardens in colder temperatures to stay warm throughout the day.


Pea stone gravel is looked after for its bright color and its rounded edges.

Small stones make a visually interesting variation when used as a mulch in your landscaping and do not need an annual substitute like organic mulches.

The downside is that the pea stone represents and holds heat, burning sensitive plants such as annual and seasonal flowers and drying out the soil’s top layer.

  1. Measure the place where the pea stone is to be added. Measure the length and the width, and then decide how deep you want to spill the pea stone gravel. When used as a mulch or a pathway, it should be between 2 and 4 inches thick.

  2. Buy enough of the gravel to suit your room. Check the coverage map given by the retailer when you order the bag. When ordering bulk, share dimensions and depth specifications with your sales associate to better estimate how many you need in cubic feet.

  3. Rake the soil in the field where you plan to use a steel garden rake to mount the pea tile. This splits the clumps and exposes the sharp rocks. Remove the rocks that can pierce the fabric of the landscape.

  4. Cut the landscape fabric to match the area you trimmed using a kitchen knife or scissors. Break the “Y” in the cloth to slide it over narrow trees. Break off the cloth’s end and tie it around bigger plants, such as shrubs or trees.

  5. Place the pea stone on top of the landscape fabric until you achieve the desired width.

  6. Leave about 2 inches of gravel free space around the stems of the vine. This would continue to reduce the heat that the stone represents on the lower leaves of the plants.


  • Pea stones appear to slide over the sides of your flower beds, spilling onto your lawn. To avoid this from happening, mount edging by digging a shallow trench — about half the edging depth — along the outside edge of your flower bed before applying the gravel. Place the edging in the trench and fill the dirt around the edging.

  • When building paths out of pea stone grit, dig the soil to the appropriate level, then mount the steel edging flush with the field. This helps prevent the dirt from pressing onto the walls of the trench as you move through it. Place the landscape cloth in the trench before pouring 2 to 4 inches of pea gravel to the surface.

Reusing Your Old Fish Tank

There are a lot of interesting as well as innovative ways to use your old tank — from making a mosaic lightbox for your children’s bedroom to using it as a table centerpiece during your favorite holidays throughout the year. Here are five fun ways to compost your fish tank.

Food Grow

If you are searching for a more realistic way to repurpose your fish tank, look no further than this recommendation.

Did you know that you can cultivate your plants or herbs in your own home with only a little lighting and the waste that fish naturally produce?

Why don’t you abandon the tank like a fish tank and transform it into an aquaponics tank?

Aquaponics is a combination of holding fish and growing plants together. You’d have a little tray on top of your tank, where the plant grows in pebbles of clay.

The water from the river will have nitrates in it from the fish waste that the plants will use to expand. In exchange, the plants will disinfect the water before returning it to the fish, so you need minimum care.

Great if you liked holding the fish but didn’t like washing it out! This project will make you spend about two hours to set up, but you’ll be producing food for years to come.


This simple and fast upcycle is ideal for people looking to bring a new look to the dining table.

The project would take a time of 10 minutes, and everyone can do it. You’ll need some pebbles, candles, and lights for this craft to complement the time of year.

Using a range of larger and smaller candles to create some depth for the centerpiece. Place the taller candles on the back of the tank and some smaller candles on the front.

Then carefully sprinkle the pebbles around the candles to keep them in place. You should add any bigger pebbles along the edges as well.

Depending on the season, you can spice it up by adding some Christmas candles or mini Halloween pumpkins.


This is a simple activity that you can do with your kids in their bedrooms. You’ll need a lot of brightly colored glass paint, a black glass paint pen, and some paint brushes.

Decide on the style you’d like for your lightbox. You may want to model it around your favorite movie or stick to a fish tank theme.

Draw the template onto paper that has been cut to the same scale as either side of the tank.

When you’re pleased with the plan, stick the paper to the inside of the tank as a guide.

Using the black paint pen to draw all the main lines, each segment may be painted in a different color once the line has dried. When the paint is dry, you can use strip lights or fairy lights on the inside to illuminate the tank.

Depending on how many helpers you have, this project will take a few hours.

Coffee Table

This last one is a bit more daring and DIYers among us! Why don’t you turn your tank into a coffee table?

Cover the bottom of the tank with sand, pebbles, and driftwood. You would also be able to pick them up from your beloved beaches and build a very unique meaningful table.

If you’ve filled the reservoir, you can stick a large piece of wood to the top with glue, and you’ve got your very own handmade coffee table.


Let’s say that you’re not in the mood to raise any more animals – how about plants?

A terrarium makes a low-maintenance garden that you can keep in your home, like a small greenhouse. They’re fun to make, too!

Next, select some thin, moisture-tolerant plants that you’d like to use. After washing your aquarium, pour some gravel and activated carbon for drainage.

Attach the moss coat, then the dirt. Now that you have set your foundation, you can install your plants and whatever decorations you want. Finally, apply a tiny volume of water.

It is up to you if you want to cover your aquarium; if you’re exposed, make sure to take some water once a week. If yours is locked, make sure to leave some fresh air inside now and then. And don’t forget to trim any sick or dying plants down.

Children’s Fairy Garden

Why don’t you do a fun project to turn your old aquarium into a magical fairy garden for your children?

Use the dirt and the stones to create a path that leads through the garden, and then make your fairies or use their games to bring the garden to life. You can even incorporate twinkling lights to make it much more fun for your kids.


Reusing your old fish tank gravel and fish tanks will help conserve the environment. Plus, reusing them is not that difficult if you think about it. This will save the environment and save you from spending too much on home decorations.