How to Tell if Aquarium Glass Is Tempered

Tempered glass is a type of safety glass designed to shatter into small, relatively harmless pieces. In the event of an accident, tempered glass will break with edges that are not as sharp as those from non-tempered glass. This lessens the chance for injury and also helps keep occupants in cars or buildings from being ejected from their seats or rooms. Tempering can be identified by looking at whether one side has a cross pattern on it – this signifies the process of tempering. 

How to Tell if Aquarium Glass Is Tempered

To learn more about how to tell if aquarium glass is tempered, click here! Aquarium glass is tempered to prevent injury and keep people in buildings and cars from being ejected. Tempered glass has a cross pattern on one side and will shatter into small, relatively harmless pieces when broken. You can tell if aquarium glass is made of tempered material by looking for the cross pattern. If you’re interested in finding out how to test aquarium glass yourself, click here to find out!

Reason to Tell if Aquarium Glass Is Tempered

While not a significant safety or health issue, it is essential to know if your aquarium glass has tempered material in it. If you plan on cutting corners when it comes to the care of your fish tank and chooses to use non-tempered glass for its construction, there is a chance flying shards of glass will injure you should get the material break. If you’re curious to know how to tell if your aquarium glass is tempered, click here!


It would help if you were especially careful when working with non-tempered glass – it will not shatter into small pieces and cause serious injury. The non-tempered glass will often list whether or not it has been tempered on the packaging. If you have any doubts or questions about what type of glass is being used, it’s best to ask the manufacturer before purchasing. Click here to read how to tell if aquarium glass is tempered!

Steps on How to Tell if Aquarium Glass Is Tempered

Step 1: Look for a Cross Pattern 

Tempered glass is identified by the cross patterns found on one side of the material. The glass is first heated and then rapidly cooled to create these patterns.

Step 2: Test the Glass

If you want to know if your aquarium glass is tempered or not, you can use a simple home test. Just apply pressure to the glass and see if it gives way – the tempered glass will not be affected by this pressure and will not break, while non-tempered glass will give under pressure.

Step 3: Check for Instructions

Non-tempered aquarium glass may contain instructions on how to tell if it is tempered. Check the packaging or manufacturer’s website for this information. You can also ask your retailer or seller directly if you’re not able to find anything online.

Non Tempering Aquarium Glass

Step 4 : Once Tempered, Always Tempered 

Unlike non-tempered glass, once tempered glass is created, it will always be tempered and never return to its original state. This is because the chemical makeup of tempered glass is changed during the tempering process and cannot go back to its original state.

Step 5 : Keep it Safe

Although non-tempered aquarium glass can be found in fish tanks, it’s important to ensure your safety when dealing with this material should something happen. Be sure to keep people and pets out of range if you suspect your glass has broken.

Step 6 : Use the Right Tools

Cutting Tempered Glass

Non-tempered aquarium glass can be cut using standard tools; however, it’s essential to be extra careful when cutting tempered glass since the tempering process has already weakened the material. In addition, it is highly recommended you use a special glass cutter for the job since the process is more delicate.

Step 7 : Clean-Up

Once your aquarium is set up using tempered or non-tempered glass, it’s important to clean regularly. Most manufacturers recommend cleaning at least once a week with either vinegar or bleach to keep your tank looking good and safe for your fish.

you can check it to Cut Aquarium Glass .

Cleaning  Aquarium Regularly

Tips and Warnings


  • If you want to find out how to tell if glass is tempered, look for the cross pattern on one side of the material. Tempered materials are identified by their distinctive cross patterns.
  • If you’re uncertain about whether your glass is tempered or not, test it yourself using a simple home test or ask your retailer or seller directly.


  • Be sure to keep people and pets away from your tank if you suspect it has broken. Non-tempered glass can be sharp and cause injury – tempered glass is already weakened and may shatter into small pieces.
  • Ensure you’re using the proper cutting tools when working with non-tempered aquarium glass since this material is more prone to breaking.
  • It’s important to regularly clean your aquarium using the appropriate methods since both types of glass can accumulate dirt and debris quickly. Read more about How often I should clean my fish tank here.

So, now that you know how to tell if aquarium glass is tempered make sure you stay away from non-tempered tanks. It’s also a good idea to have some test you can do at home before purchasing new glass for your tank or asking a store employee if the glass is tempered.

When thinking about how to tell if aquarium glass is tempered, the most important thing is to ensure that everyone in your household knows what to do should it break!

Frequently Asked Questions

Can You Drill Tempered Glass Aquarium?

Yes, tempered glass aquariums can be drilled. This type of glass is made from two sheets of laminated glass that are heated and then pressed together at high pressure. The result is a layer of tempered glass that is stronger than regular window glass.

Are Oceanic Tanks Tempered?

Yes, Oceanic Tanks are Tempered. The most important part of this question is “are Oceanic Tanks Tempered?” because the next one is about how to maintain them.

Which Glass Is Best for Aquarium?

The best aquarium glass is a non-reflective glass that has a low iron content. The most common type of aquarium glass used today is the flat beveled edge or side walled glass made with soda lime or silica.

An alternative to this is the mirror-like tempered or Pyrex glass, which has no iron and a low alkali content and can be manufactured in various colors, including clear, green, blue, pink, purple, and orange.

Aquariums are increasingly popular among hobbyists as well as professionals who use them for research purposes. They can also be found in homes across the world as both pets and decorations.

How Thick Should My Aquarium Glass Be?

It is important to have an aquarium that is the right size for your fish. The glass should be about a half-inch thick, or 3/8 of an inch, for optimum performance and health.

To check if your glass has been tempered correctly, hold it up to the light. If you see any light passing through in between the panes of glass, then it’s not tempered properly and will break easily.


There are a few ways on how to tell if aquarium glass is tempered, and we’ve outlined them below. If you have any questions or need help determining if your tank needs new glass panes, please don’t hesitate to contact our team of experts at Aquarium Glass Pros for more information.

We will get back to you with expert advice on how best to handle this situation so that you can get back up and running as quickly as possible! Thank you for reading our article. If you have any questions or concerns, please leave a comment below.

You may read it also – How to Cut Aquarium Glass .

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