Is Aquarium Glass Tempered?

Fish are incredible creatures but they are also awesome pets. One of the most attractive qualities to fish is that they are low maintenance, making them perfect for someone with a busy lifestyle who still wants to have a pet at home.

Another great appeal about fish is that they are also fantastic for children as a first pet. Even someone under the age of 10 has enough common sense to take care of a fish, and kids usually love them.

So, if you purchase a fish, what is the first thing that you should buy? If you guessed an aquarium you are right! Aquariums are the most important thing to buy and put thought into because this is going to be your fish’s home. You want it to have space and enough to swim around in.

Is aquarium glass tempered and what to look for in an aquarium?

Aquarium hunting can be very difficult mainly because there are so many being offered on the market today. They range in size, in features, in price, and it can be quite daunting to figure out which one to purchase and which to stay away from.

The key to buying the best aquarium is figuring out what size is going to work the best for you. You want one that can hold all the fish that you have and that also has a great look to it. Another main asset to a great Aquarium is that it is built with a water filter already in it. This is going to decrease the amount of cleaning you have to do and also keep your fish healthy.

Many people wonder what the glass of their Aquarium is made of, and there is an ongoing question we face with whether aquarium glass is tempered or not. Is aquarium glass tempered and if so, why?

So, is it?

The answer to the main question of our article is yes, the glass on many aquariums are tempered. However, that does not mean they all are.

When purchasing a new aquarium, it is up to you to look at the specs and see if the one you are purchasing is tempered or not. Some manufactures decide to build theirs with float glass, but this type of glass is known to not be as strong and as tough as tempered glass.

Tempered glass is created by heating glass at a very high temperature and then right away cooling it down. Through this process, you get one of the toughest glasses around.

The reason aquarium glass is usually tempered is because it is able to withstand a lot of pressure from the amount of water placed within the fish tank. This is why for the most part you do not see aquariums shattering or breaking; it is the glass they are using.

However, if tempered glass does break, it shatters in tiny pieces. In order to tell if your aquarium has been made out tempered glass, there is usually a small stamp placed in the corner of the aquarium. You can also check for this stamp on both car doors and doors made for storms.

How to tell if it’s tempered

So how can you know if you aquarium glass is tempered? Well the first thing to do is look for that stamp, but sometimes there is none to be seen. In order to tell it apart, look at the edges of the tank. Tempered glass usually has a slight warp to it and even a ripple effect.

The glass can never be cut or even drilled. Another way to tell if you have tempered glass is by using polarized sunglasses, which will allow you to see a fuzzy black diamond or circular pattern to the tempered glass.

The use of tempered glass

Many people opt to purchase aquariums that are made out of tempered glass because it brings them peace of mind. Fish safety is very important and you do not want to be out of the house, and the aquarium breaks.

If the fish are exposed to air for too long they will die. Tempered glass is incredibly strong and some of the world’s best aquariums are built out of it, which is why we recommend it to you too.


So, there you have it, there are many aquariums on the market right now that have been made using tempered glass. For added peace of mind, look for the tempered glass seal on the aquarium you buy.