How To Build An Acrylic Fish Tank Aquarium Easily

Aquariums are not only home to your beloved pets but also an aesthetic addition to your home. Acrylic fish tanks are a sight to behold and make a perfect focal point for your sitting room. They add wow-factor to the interior space. It feels like you have brought a whole other world into your living room. The marvel of sea-life is a sight for the sore eyes.

Acrylic aquarium fish tank comes in a variety of styles. You can get one according to your preferences. However, why buy when you can easily make one by yourself!

Building a DIY acrylic fish tank is quite an interesting DIY for fish lovers. Building the acrylic fish tank aquarium on your own gives you the freedom to choose whatever material you want and whichever design you like. Glass is usually used as the building material in fish tanks. However, with the widespread use of plexiglass, acrylic fish tanks are also in use. In fact, plexiglass fish tanks are preferred nowadays due to their high strength value and optical clarity. You have more design options in acrylic fish tanks and they are easy on the wallet. Above all, you can easily DIY a plexiglass fish tank. So, let’s build an aquarium with acrylic sheets.

Table of Contents

• 1 Some Considerations while Constructing a Fish Tank
• 2 Let’s Build!

Some Considerations while Constructing a Fish Tank

Before jumping right into the building process, you need to consider plenty of things and decide about them at first. Deciding the dimensions of the fish tank is one of them.

The general rule of thumb says that you need three gallons per inch for fish over three inches. Keeping this rule in consideration, here are some size recommendations for acrylic sheets.

• If you want a 0-12 inches high fish tank, the thickness of the sheets should be ¼ inches.
• For 13-19 inches height, the acrylic glass should be ⅜ inches thick.
• For a 20-24 inches aquarium, the thickness of plexiglass should be ½ inches.

Take your time and decide the dimensions of your fish tank in order to place the right order for plexiglass and other materials.

Supplies You’ll Need

Once you have decided the dimensions of your desired fish tank, you are good to get the supplies and place an order for pre-cut acrylic glass. Here is what you will need to build your dream fish tank.

• Glass cutter
• Sandpaper or metallic file 
• Custom-cut Acrylic sheets
• Acrylic glue 
• Aquarium silicone
• Duct tape
• Syringe

Let’s Build!

Now that you have decided on the dimensions of your fish tank, place the order for custom cut plexiglass sheets. Alternatively, you can just get one sheet of acrylic and cut it yourself. If you are going for pre-cut sheets, you can jump right into the building process. However, if you are planning to cut the acrylic on your own, here is how you can do it.

Step 1: Cutting the Acrylic to Size 

Take the plastic glass sheet and mark where you want to cut the sheet. Take the glass cutter and create a deep indent on both sides of the sheet. Align the line with the edge of the table and apply pressure on the sheet until it snaps off. Now smooth the edges of the sheet using metallic silence or sandpaper. 

Repeat the process to get four equal sheets of acrylic. 

Tip: Don’t peel out the protective film from the sheet. If there is no protective film, use masking tape to cover the sheets before cutting. 

Note: If you have custom-cut sheets, just smooth the corners with a sharp razor or utility blade and get into building the fish tank. 

Step 2: Position the Sheets

Take off the protective film a bit. Don’t remove the whole film, just take off 2 to 3 inches and position the sheets together. Lay the bottom sheet on the leveled work area. Position the other four layers one by one.  You can take help from a friend. 

Start with two sheets and secure them together at the meeting point with 3 to 4 inches long tape. Position the third sheet and tape it. Do the same for the fourth sheet.

Don’t tape the sheets too tightly.  Leave the small gap for the glue to seal it.

Step 3: Apply Glue at the Bottom Seams

Now, fill the syringe with acrylic glue and start applying it at the four bottom joints of the tank. Let it dry for a good four to five hours. The glue should be perfectly dry before moving on to the next step.

Step 4: Glue the Vertical Seams Together Now

Now that the bottom is secure, flip the tank over and fill the joints with acrylic glue. Leave the tank for another four hours to dry.

Step 5: Make Sure That the Tank is Glued and Secure

For this step, take the flashlight and carefully check all the joints. See if any part is not properly glued. If you find any such space, glue it and leave it to dry. This step is important to make sure that the fish tank is watertight. 

Use aquarium silicone to secure all edges and ensure a good seal. 

Kudos to You! You Have a Brand-New Aquarium Now

Here is your very own DIY fish tank all ready to grace your living room and give some relaxing moments. Fill the tank with accessories and aqua plants to give your fish a new home to live in!

FAQs

How thick should acrylic be for a fish tank? +

Acrylic thickness depends on tank size; for a 24-inch-tall tank, at least ½ inch is recommended. Thicker panels prevent bowing and ensure long-term durability.

Is acrylic safe for saltwater tanks? +

Yes, acrylic is safe and commonly used for saltwater tanks. It’s non-toxic, highly durable, and resistant to salt corrosion.

How do I seal an acrylic aquarium? +

Use Weld-On acrylic cement for strong, leak-proof bonding. Apply it along clean, fitted edges and let it cure fully before water testing.

Can I drill holes in acrylic for filtration or plumbing? +

Yes, you can drill acrylic using a plastic-safe drill bit. Always drill slowly to prevent cracking or melting the material.

Does acrylic scratch easily in fish tanks? +

Acrylic is more prone to scratching than glass, especially during cleaning. Use a soft sponge or acrylic-safe scraper to maintain clarity.

How do I clean an acrylic aquarium without damaging it? +

Clean with a microfiber cloth and acrylic-safe cleaner. Avoid harsh chemicals or abrasive tools to prevent surface damage.