How Often to Change Gravel in the Fish Tank - hygger (2024)

By Sarah Duke from pickedbyfish.com

It’s vital to keep an eye on the conditions in the tank. This includes looking at the substrate you are using, which includes the gravel. But how can you make sure that you are caring for the aquarium gravel properly and replacing it correctly? Here are some of the tips you should know.

Do You Need to Replace the Gravel?

To answer this question, we need to understand the role that the gravel will play in your tank. The substrate will host good bacteria. This will allow you to clean the water. It will usually take a few months for the bacteria to get established.
After this period, it will be easy to keep the gravel healthy. All you need to do is vacuum the gravel. This will allow you to remove any debris that has accumulated on the gravel. This semi-auto gravel cleaner has everything you need to keep the gravel clean.

There are a few signs that it might be the right time to clean the gravel. This includes when there is a layer of debris, like feces, that has started to form on top of the gravel. It’s also important to make sure that you are regularly testing the water. If the ammonia levels start to creep up, it’s time to vacuum the gravel.

How Often to Change Gravel in the Fish Tank - hygger (1)

Working out a maintenance routine will depend on how many fish you have. The more fish in the tank, the more frequently you will need to clean the gravel. Generally, you should aim to do this every few weeks.

Sometimes, you will notice detritus worms living inside the gravel. These are small, white creatures. If you see this, it’s time to replace the gravel, as these worms will start to cause the material in the tank to decay.
As long as you do this, you won’t need to replace the gravel in the tank. But that doesn’t mean that you can’t. Sometimes, you will want to remove and replace the old substrate. Though simple, this can refresh the tank, making it look as good as new.

Here are the steps to follow when replacing the gravel in your fish tank

Wait for the Right Conditions
Wash the new aquarium gravel until it runs clear.
Then, keep it in a new tank, with the filter running. This will allow beneficial bacteria to build up on the gravel. It will take around a month. And it’s a good idea to test the water. There shouldn’t be a big difference between the two tanks.
You need to have the right conditions for changing the gravel.

First, don’t do it after you have changed the filter. This will allow the good bacteria to stabilize the water in your tank. It’s also a good idea to regularly test the water. Make sure that the ammonia and nitrate levels are zero. You can use a tank water test kit. If these conditions aren’t happening, it’s best to wait. You don’t want to stress your fish when you are changing the aquarium gravel.

How Often to Change Gravel in the Fish Tank - hygger (2)

Move the Fish to a Temporary Tank
Once these elements are in place, it’s time to get ready to start adding fish to the temporary tank. You don’t need to have a full-size aquarium. You only need a 10-gallon tank. This can often come in useful. For example, it can be used as a quarantine tank, where you can observe new fish before you put them into your new tank.

If you haven’t got a second tank yet, don’t worry. There are plenty of options for you to choose from. This list of 10-gallon aquariums will help you find the right one.
To move the fish, you need to fill the smaller tank with water. Then, remove any decorations from the regular tank and put them into the temporary aquarium. They will often have beneficial bacteria, which you will want to protect. Before you move the fish, test the water, so you know it’s safe.

It should now be a simple procedure of removing the old gravel. Then scoop out the new gravel from the temporary cage and put it into the regular cage. Remember, you need to drain the tank before you add the gravel. Otherwise, it can trap debris on the bottom of the tank. Before you add water to the tank, make sure that everything is spread out evenly. This website has more tips on how you can add gravel to your fish tank.

Conclusion

Aquarium gravel is an important component of any fish tank. It will have beneficial bacteria, helping to create a healthy environment for your fish. Plus, it will help your fish’s mental health, replicating their natural environment. The glass bottom can freak some species out. Even better, as long as you vacuum the debris up every few weeks, you shouldn’t have any problems.

How Often to Change Gravel in the Fish Tank - hygger (2024)

FAQs

How Often to Change Gravel in the Fish Tank - hygger? ›

The more fish in the tank, the more frequently you will need to clean the gravel. Generally, you should aim to do this every few weeks.

How to clean fish tank gravel algae? ›

If you don't know how to clean fish tank gravel, don't sweat it — one of the best methods is to use a gravel vacuum. These work by sucking up the gravel and thereby removing any debris and algae, while a filter prevents the gravel itself from actually getting sucked up.

How often should fish tank filters be changed? ›

Usually, mechanical and biological filters do not need to change regularly. You can replace them until they fail to filtrate the aquarium water. Also, you should change the chemical filters once a month. When you change the media, you can soak them in aquarium water before adding them to the tank.

Do I need to clean new gravel in aquarium? ›

Yes, you should remove the gravel from the bag and place it in a clean bucket. Run water over the gravel several times to remove any dust that may be on it. Then hold the gravel in place and empty the water from the bucket. A household colander can help speed the process.

Does vacuuming gravel remove beneficial bacteria? ›

Your good bacteria live in your substrate deep within the crevices. Vacuuming will remove only a tiny percentage. If you are relying on your substrate to do the bulk of your biological filtration for your nitrogen cycle, your system is not sustainable.

Why does my fish tank keep getting green algae? ›

Your freshwater tank can experience a green water outbreak if it is exposed to excessive light, an abundance of nutrients in the water column (such as when dosing liquid fertilizer), or a combination of both issues. It can also happen when there is too much ammonia in a new tank or when you feed the fish too much.

What gets algae off of fish tanks? ›

The best way to tackle algae is to actually get your hands in the tank and manually remove as much as you can. Use an algae pad or algae scraper on the glass daily, and brush plant leaves and decor too.

How often should I change the water in a fish tank? ›

Perform a 25% water change after 15 days. Remember to treat tap water with Aqueon Water Conditioner before adding it to your aquarium. There are different philosophies on how much and how often to change water, but 10% to 25% every 1 to 2 weeks is a good rule of thumb. Small frequent water changes are best.

Should fish tank filter be on all the time? ›

In your aquarium, your filters, heater, and air pumps need to stay on always to keep your fish alive. However, your filter especially needs to stay on 24/7, and should not be turned off unless it is for cleaning purposes and cleaning should only take an hour or two to complete.

How do I know if my fish tank filter is working properly? ›

First, check that the filter is still working. Look for water bubbling out of the top of the pipes. If there are no bubbles, the filter may not be working. Therefore, repair or replace the filter.

How often should I change the gravel in my fish tank? ›

The more fish in the tank, the more frequently you will need to clean the gravel. Generally, you should aim to do this every few weeks.

What happens if you don't clean gravel in a fish tank? ›

Most aquarium setups require regular gravel cleaning. The gravel bed is where most waste accumulates if it is not taken up by the filter. If this waste is left to decompose, it will deposit nitrates and phosphates into the water column.

Why is my aquarium gravel always dirty? ›

Excess food, fish waste, decaying plant matter will all sink to the bottom. Left untouched, this will feed algae growth and harmful bacteria among the substrate. To keep the aquarium substrate clean: Use a gravel cleaner when performing partial water changes.

What happens if you don't wash fish gravel? ›

Most aquarium setups require regular gravel cleaning. The gravel bed is where most waste accumulates if it is not taken up by the filter. If this waste is left to decompose, it will deposit nitrates and phosphates into the water column.

Does aquarium gravel hold bacteria? ›

Perhaps the most important function aquarium gravel serves is as a home for good bacteria that provide biological filtration.

Should I change the rocks in my fish tank? ›

Replacing aquarium gravel in an established tank is debated because of the potential impact on the bacterial colonies that neutralize wastes in the tank. Some feel that most beneficial bacteria live in the substrate, and therefore the gravel should be disturbed as little as possible.

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