White Haze On Aquarium Glass

Last Updated on January 13, 2022 by Fabiola L.

Many fish owners have experienced white haze on aquarium glass. Though this problem is common, it can be annoying to deal with. Fortunately, there are many ways you can remove the haze and prevent it from happening in the future.

The white haze on your tank is often caused by limescale. Though it can be tricky to remove, with the right steps you will be able to get it off. It is a common problem that many fish owners are faced with at some point or another.

What Cause Cloudy Aquarium Glass?

Hard water is a common choice for aquarium water. However, hard water can leave a mark on your aquarium, causing a white haze. This white haze, which is often limescale, is a result of what is left from the evaporation of hard water.

Hard water is water that is rich in minerals. In homes, it will often leave a white residue buildup around your shower head. When it evaporates, the gaseous water will leave behind the heavier elements which will stick to surfaces.

Though limescale is harmless to your fish, it can leave behind an unattractive look on your aquarium. Minerals such as lime and calcium are common culprits to creating that create the white crust and streaks you see on your tank.

Depending on where you live, the hardness level of your water will vary. In some places, it is much harder than in other places.


Learn more about: What Makes Aquarium Water Cloudy?

How To Clean Cloudy Aquarium Glass

Though it can be tempting to use Windex or other household cleaners to remove limestone, you will want to avoid this. Household cleaners, such as all-purpose and glass cleaners, can be toxic to your fish. Even the smallest amount of residue left behind is enough to be potentially harmful.

Fortunately, there are safe alternatives to household cleaners that you can use to effectively remove the limescale from your tank. These alternatives will transform your dirty fish tank.

To clean limescale from your fish tank, move your fish and plants into a holding tank. Remove and disconnect any air pump, filters, heaters, or lights. In addition, remove any decorations that are in the tank.

Then, carefully siphon or pour out the water from your fish tank. If needed you can remove the gravel, but it is not necessary. Once you have removed all of the water from the tank, you can then proceed to clean off the limestone.

Then, place your fish tank down on a towel to prevent a mess. Use a towel or non-abrasive sponge to clean the tank with your choice of cleaner. If using white vinegar, let it sit for 10-20 minutes on the glass.

Once you are done cleaning the fish tank, wipe it down with a towel. Next, rinse out the inside of your tank to remove any cleaning product.

Set up your tank as you had it before and fill it back up with water. Once it is ready, return the fish and live plants to the aquarium.

Read more about How To Clean Aquarium Glass White Residue?

Fish-Safe Cleaning Spray

Many pet stores will sell a fish-safe cleaning spray you can use to remove limescale. The spray is safe to use on both the inside and outside of the aquarium. It works to remove tough limestone and crusty mineral buildups.

The spray is completely safe to use on aquariums and will not harm your fish or plants. It can be used with sponges or towels when cleaning. There are several different brands available of fish-safe cleaning spray that are available.

White Vinegar

White vinegar is a common household product, as it has many uses. It can safely be used to clean your aquariums. In addition, white vinegar is a cheap option compared to some fish-safe cleaners.

When using white vinegar, use a spray bottle to administer it onto your dirty tank. After letting it sit for 10-20 minutes, you can wipe it off with a sponge or towel. You may need to scrub the white vinegar with a sponge to remove all of the limescale.

If need be, you can repeat the process until the limescale is gone. Once done, rinse out your fish tank and set it up as you had it before.

Algae Scraper

Algae scrapers can be used to remove limescale build-up. It safely and effectively scrapes the limescale off the glass of your aquarium without the need to use other products.

How To Prevent Limescale Build-Up In Your Fish Tank

It can get annoying to have to polish aquarium glass on a regular basis. Fortunately, there are some simple ways that can help prevent the build-up of limescale on glass.

By using distilled water instead of tap water, as it won’t have the same traces of calcium that tap water does. In addition, you can also use water conditioners to help balance the mineral levels in your tank.

Regularly cleaning your fish tank and doing routine water changes of 30% can also help keep the levels down. It is also best to regularly test your water to test the minerals and pH levels in your tank so you can better maintain them.

Cleaning and Preventing White Haze On Aquarium Glass

Cloudy aquarium glass can be a frustrating problem for any fish tank owner. Though limescale build-up is not harmful, it can be annoying to look at. It can make your tank look dirty and make it hard to view your fish.

Fortunately, you can use fish-safe cleaning spray, white vinegar, or algae scrapers to clean it off. You never want to use household cleaners like Windex, as they can be potentially harmful to your fish. Though it may take a few tries, you can successfully remove the limescale.

In addition, you can help prevent limescale by using distilled water over tap water. Water conditioner can also help manage the water levels. It is also a good idea to regularly clean your fish tank and routinely change the water.

Do you have any questions regarding white haze on aquarium glass? If so, please ask any questions about what causes the white haze, as well as how you can prevent it and clean it off your aquarium.

Read more about: How To Get Rid Of Blue-Green Algae In A Planted Aquarium

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