How to Replace Aquarium Bottom Glass

The aquarist will tell you all about replacing your aquarium bottom glass at the other end of this post. Some people find it difficult to replace their bottom glass, but anyone can do it with the tips and tricks in this blog post! Unfortunately, it’s not always easy to know how to take care of an aquarium without taking a course or asking someone for help.

Aquariums are great because they’re self-sufficient and don’t need much work besides cleaning and feeding them now and then. This is why we created these blogs posts so that even those who don’t have experience can learn how simply taking care of an aquarium is!

The next time you need help with something like replacing your tank bottom glass, don’t hesitate to ask us! So, this article is for you. You will learn how to replace aquarium bottom glass with just one simple trick!

How to Replace Aquarium Bottom Glass

Step to Follow on How to Replace Aquarium Bottom Glass

Step One: Determine

First, you need to determine whether or not you can replace the aquarium bottom glass. Sometimes, the bottom glass is glued onto the frame and cannot be removed without breaking it. If you are not sure, try gently prying at the edges of the glass with a flathead screwdriver.

If it does not budge, it is glued. Repair would involve replacing the entire tank. If it does move slightly, try to ascertain how it is held onto the frame. If there are plastic clips along the edge of the glass that snap into metal bars attached to the frame, then you can pop them out with a screwdriver or butter knife and pry underneath the glass to remove it.

Determine Whether or Not You Can Replace

It should be relatively easy to lift out after that, but you can use a spatula or spoon if you want something more substantial for leverage. If it is held in place by a metal bar running down the edge of the tank’s frame, you can loosen one end and gently push it to one side so that the glass pops out.

Step Two: Mark

Before removing the glass, it is essential to mark the location of the holes for the water inlet and outlet. This is usually done with a permanent marker. If you are not sure where they are, you can open up the tank and take a look. This isn’t ideal, but it is better than nothing.

If you remove a piece of glass that is the same size as the one you are replacing, you can reuse the old marks. If not, make new ones. It is essential to get these measurements correct, as you will need to drill new holes in the replacement glass that correspond with the old ones.

Mark the Location

It may not be apparent where the holes were because of rust or other debris, but you should be able to get it by feel. If needed, you can use a dental pick or another sharp object to scrape away any rust or buildup around the holes to clean the glass while marking it.

Step Three: Remove the Glass

After marking the location of the holes, it is time to remove the old glass. This is done in the same way as described in step one. If you are using the same size piece of glass, be very careful not to damage it while removing it. It is also a good idea to have a partner help you hold the glass while you pry it out to avoid it falling and breaking.

If there is any rust or debris on the frame, you can use steel wool or a wire brush to remove it. You should also make sure that the frame is dry after cleaning it because the new glass will not adhere to a wet structure. It is also good to clean the frame before putting the new glass in place.

Then, reverse the process to put the new glass in place. Make sure that it is level and fits snugly into the frame. If there are any gaps, use silicone sealant to fill them. These steps should help you in learning how to replace aquarium bottom glass.

Step Four: Add New Glass

Now it is time to add the new glass. You may need a partner for this part because there will not be much room to maneuver when you are putting it in place. Start with one corner and gently push the edge of the glass into place, starting at one end and working towards the other.

Add the New Glass

If it does not fit perfectly, use a rubber mallet or hammer to tap it into place gently. Make sure that you do not hit the glass too hard, or you may break it. Once it is in place, use a silicone sealant around the edge to secure it and prevent water from seeping through.

It is important to note that if the new bottom glass does not fit snugly into place, separate pieces of glass can be glued together to fill in gaps. This is often done when one part of the glass has been broken to fit inside the frame.

Step Five: Maintenance

Once the new bottom glass is in place, you can fill the tank with water. However, make sure that it is not full because there may be air between the pieces of glass. Remove any excess water to avoid trapping air inside. Once there is no more room for bubbles to escape, you can fill it to the desired level.

The new glass will likely be very stiff after drying, making it almost impossible for you to move. To fix this, place a cloth or paper towel in some clean water and microwave it until slightly damp. Then, remove the cloth from the water and gently press it against the bottom of the tank for about 10 seconds.

Now that the new glass is in place, you will need to take care of it not to break. The best way to do this is by keeping the water level at or below the top of the glass. You should not have to replace the glass for about six months if you do this. This will help in how to replace aquarium bottom glass.

Step Six: Cleaning

It is important to clean the tank and the glass regularly to prevent any buildup of algae or other debris. This can be done by using a sponge or cloth that has been soaked in vinegar or ammonia. Be sure to rinse the tank and the glass thoroughly afterward to remove all chemicals.

Clean the Tank

If there is a lot of debris or algae, you should also change the water. This is done in the same way that the glass is cleaned. It can be challenging to remove all debris while changing the glass because some may be stuck underneath it.


If you are looking to replace your aquarium bottom glass, the first thing you should do is measure it to make sure that what you order will fit. You can also use a ruler to figure out how much overlap there needs to be with the frames on either side of your tank for everything to fit perfectly.

We hope that this article has helped answer any questions about replacing aquarium bottom glass, and we wish you luck in finding one! The conclusion paragraph is informative and provides information on how to replace aquarium bottom glass.

Smart Home Pick