How to Make a 2.5 Gallon Aquarium Divider: Step-by-Step Guide.

Hey there fellow aquarium enthusiasts! Have you ever needed to separate some fish due to aggression or just want to create an interesting design in your tank? Well, making a divider for your aquarium is easier than you think! In this blog post, we’ll be showing you how to craft a 5 gallon aquarium divider step-by-step. Don’t worry if you’re not crafty, it’s a straightforward process that anyone can do.

Plus, it can save you money by avoiding the need to purchase costly dividers. Dividing your aquarium can be beneficial in many ways. Not only can it provide a safe space for a fish to retreat to, but it can also allow for breeding or keeping different fish species without them getting into a confrontation.

While some aquariums come with built-in dividers, others do not. That’s why learning how to make your own divider can come in handy, no matter the aquarium size. For this tutorial, we will be using an aquarium acrylic divider.

This method works best for smaller aquariums. We will provide specific dimensions for a 5 gallon aquarium, but you can adjust the measurements accordingly for larger or smaller tanks.

With just a few supplies and some free time, your divided aquarium will be a reality in no time. So let’s get started on creating a safe and beautiful environment for your aquatic pets!


If you’re looking to create a safe and comfortable environment for your aquatic pets, making a 5 gallon aquarium divider is a simple and cost-effective solution. First, measure the length and height of your tank to determine the size of the divider you need.

Next, purchase some clear plastic mesh and cut it to fit within the tank. Secure the divider in place using suction cups or hooks. You can also add decorations, such as rocks or plants, to both sides of the divider to enhance the look of your aquarium.

Not only does a divider help to prevent fish fighting, but it also makes cleaning and maintenance much easier. With a little bit of effort, you can create a happy and healthy habitat for your aquatic creatures.

Materials Needed

When it comes to starting a DIY project, one of the first steps is to gather all the necessary materials. Depending on the project, the materials you’ll need can vary widely. For example, if you’re building a piece of furniture, you’ll likely need lumber, screws, a saw, sandpaper, and possibly some paint or stain.

On the other hand, if you’re working on a sewing project, you’ll need fabric, thread, and a sewing machine. It’s important to take some time to research the specific materials you’ll need for your project to ensure you have everything on hand before you begin. This will save you time and money in the long run and help ensure your project is a success.

how to make 2.5 gallon aquarium divider

Step-by-Step Guide

A step-by-step guide can make any task seem less daunting, which is especially true when it comes to tackling a new project or skill. An overview can provide clarity and help you break down larger goals into smaller, achievable steps. Whether you’re looking to learn a new language, develop a website, or improve your cooking skills, a step-by-step guide can be invaluable.

By breaking down a larger project into smaller parts, you can track your progress and gain confidence as you go. With each task completed, you’ll feel more equipped to take on the next one until you’ve accomplished your goal. So, if you’re feeling unsure about how to start a new project, remember that a step-by-step guide can make all the difference.

Benefits of using an aquarium divider

If you’re looking to divide your 5 gallon aquarium, using an aquarium divider can be a great option. Not only does it allow you to keep multiple fish in one tank, but it also provides plenty of benefits for both you and your aquatic pets.

For starters, a divider can help to prevent fighting between fish by keeping them separated. This is especially important if you have aggressive species. Additionally, a divider can make cleaning and maintenance easier since you can focus on one section of the tank at a time.

And if you’re looking to breed fish, a divider can be useful for separating males and females until you’re ready to breed them. Overall, an aquarium divider can be a practical and convenient addition to your tank setup. And if you’re handy with DIY projects, you can easily make one yourself using materials like mesh or plastic canvas.

Prevents Fish from Fighting

Using an aquarium divider can be very beneficial when it comes to keeping multiple fish in one tank. One of the key benefits is that it prevents fish from fighting. Fish are territorial creatures and can become aggressive towards other fish that they perceive as a threat.

With an aquarium divider, you can create separate sections within the tank, giving each fish their own designated area to live in. This not only helps to prevent fights but it also reduces stress for the fish, leading to a healthier and happier environment overall. Additionally, using a divider allows you to maintain different water conditions within each section of the tank, which is important for keeping different species of fish happy and healthy.

So if you’re looking for a way to keep peace in your aquarium, consider using an aquarium divider for a safer and more harmonious fishkeeping experience.

Maximizes Aquarium Space

If you’re tight on space when it comes to your aquarium, an aquarium divider can be an excellent solution. Not only does it maximize your available space, but it also offers other benefits. For example, it provides a way for you to segregate your fish, facilitating breeding and minimizing aggression between fish species.

Additionally, it is an affordable way to create various settings in your aquarium, creating different options for plants, substrates, and decorations. Just be sure to keep in mind the needs of each species or group of fish when creating divided aquariums. Nonetheless, with an aquarium divider, you can keep more fish in a smaller space and create a beautiful and appealing underwater world.

Allows for Separation of Fish and Plants

An aquarium divider is an excellent tool for separating the fish and plants in your tank, providing numerous benefits. For starters, using a divider reduces the chances of your plants being uprooted or eaten by the fish. This is particularly important if you have aggressive fish species that tend to nibble at plants or dig through the substrate.

With an aquarium divider in place, you can keep your plants safely on one side of the tank while the fish roam freely on the other. Another advantage is that the divider allows you to create distinct environments for different fish species, especially those that require different water conditions to thrive. As a result, you can keep a range of fish that might not otherwise be compatible in the same tank.

Overall, using an aquarium divider can help you achieve better control over your tank environment, leading to healthier and happier fish and plants.


If you want to separate different fish species or provide safety for dwarf shrimp, creating an aquarium divider is essential. Here’s how to make a 5 gallon aquarium divider yourself.

First, decide on the size and material for the divider. You can use acrylic, plastic canvas or foam board. Next, measure the dimensions and make sure it fits snugly in the aquarium.

Cut the divider to the right size and make notches to fit the filter and heater. Attach suction cups to the edges, and place the divider in your aquarium. Regular maintenance is necessary to ensure the divider stays intact and continues to provide safety for your fish.

Clean the divider regularly, avoiding harsh chemicals that could harm your aquatic pets. Overall, this DIY project is easy and cost-effective, and will keep both you and your fish happy and healthy.

Cleaning Tips

When it comes to maintaining a clean home, it’s not just about deep-cleaning every few months. Small and simple tasks can make a big difference in keeping your living space tidy and comfortable. One essential maintenance tip for a clean home is to establish a regular cleaning schedule.

This can include tasks such as wiping down counters and appliances, sweeping or vacuuming floors, and dusting surfaces. By tackling these tasks on a consistent basis, you can prevent the buildup of dirt and dust that can lead to a bigger cleaning job down the line. Additionally, regularly changing out bedding and cleaning high-touch areas like doorknobs can help keep germs at bay.

Overall, it’s important to prioritize maintenance tasks to ensure a clean and healthy living space all year round.

Replacing the Divider if Needed

Replacing the divider in your home can be necessary if it is old and worn out or if it has been damaged. It is important to keep an eye on the condition of your divider as it can affect the functionality and efficiency of your home. If you notice that your divider is sagging, has cracks, or is damaged in any way, it may be time to replace it.

This process can be done by a professional or by yourself if you have experience with home repairs. It involves removing the old divider and installing a new one in its place. By doing this, you will ensure that your home is safe and functioning properly.

Remember to always prioritize maintenance in your home to avoid expensive repairs in the future.


Now that you know how to make a 5 gallon aquarium divider, you can ensure that all of your aquatic friends are happy and safe in their own space. Who says good fences make good neighbors? Sometimes, good dividers make even better ones! So grab your tools, a few supplies, and start crafting your way to a harmonious underwater world.


What materials do I need to make a 2.5 gallon aquarium divider?
To make a 2.5 gallon aquarium divider, you will need a plastic mesh sheet, aquarium safe silicone, a ruler, a pair of scissors, and a clean workspace.

How do I measure and cut the plastic mesh sheet for a 2.5 gallon aquarium divider?
Measure and cut the plastic mesh sheet to the height and length of your aquarium using a ruler and scissors. The height should be a few centimeters shorter than the aquarium’s height to allow water to flow over the divider.

How do I attach the plastic mesh sheet to the aquarium with silicone?
Apply a generous amount of silicone to the bottom of the plastic mesh sheet and then attach it firmly to the bottom of the aquarium. Repeat this process for the sides and top of the divider.

How long does the silicone take to dry before I can place fish in the aquarium?
The silicone may take up to 72 hours to completely dry. It is recommended to wait at least 24 hours before filling the aquarium with water and placing fish in.

Can I customize the plastic mesh sheet for a 2.5 gallon aquarium divider?
Yes, you can customize the plastic mesh sheet by cutting out shapes or designs using scissors or a craft knife.

Is it safe to use a 2.5 gallon aquarium divider for fish?
Yes, it is safe to use a 2.5 gallon aquarium divider for fish as long as you maintain proper water parameters and do not overcrowd the aquarium.

How often should I clean my 2.5 gallon aquarium with a divider?
You should clean your 2.5 gallon aquarium at least once a week, or more frequently if necessary. This includes water changes, gravel vacuuming, and wiping down the sides of the aquarium.