Skip to main content
  1. Home
  2. Other animals
  3. Evergreens

What to do with your fish while you deep-clean their aquarium

Add as a preferred source on Google

If you are a new fish owner, cleaning the tank might seem scary at first. The most common concern is how to deal with your marine buddies while you clean their aquarium. For those who are just learning how to maintain their first fish tank, it’s normal to wonder about how often you should change the water or how much water you must replace.

The good news is that keeping your fish happily swimming in clean water is much easier than you think. We are here to help you learn how to deep clean a fish aquarium.

Aquarium filled with fish
Vladimir Krivoshiev/EyeEm/Getty Images

Before you get started

Make sure you have all the tools, utensils, and supplies needed to clean your tank. Having the right cleaning kit will make your life easier. Some of the most useful items you need are:

• Gravel vacuum

• Water quality test kit

• Extra bucket for dirty water

• Water conditioner

• Dish sponge for cleaning glass

• Algae scraper and blade

• Toothbrush for cleaning decor

• Glass cleaner

• Towel for wiping up water spills

• Glass-cleaning cloth or paper towel

Recommended Videos

Leave your fish inside the tank

While it seems better to take your fish out of the tank when you clean it, the stress of capturing them and moving them into a smaller container can be harmful to them. Since you will only be replacing 15% to 30% of the water with every cleaning, the fish will have enough water to swim while you gently go about cleaning.

Turn the equipment off

The most important safety precaution you must take is to turn off the filter, water heater, and any other light fixture in your tank. Prevent any accidents by making sure you have unplugged any power cables as well.

Start by testing the water

Woman testing water in aquarium
Elva Etienne/Getty Images

Maintaining the water quality of your tank is the most important part of the process. Use a testing kit to make sure you have adequate levels of certain chemicals:

• Ammonia: 0 ppm
• Nitrites: 0 ppm
• Nitrates: Less than 40 ppm

This will ensure the best balance possible for your fish to thrive. Imbalances in the chemistry of the water can be fatal to your colorful companions.

Remove algae from the glass

To always have a clear view of your pets, you have to clean the algae buildup that accumulates on the glass walls. Use a sponge to scrub the inside of your aquarium. Try to be as gentle as possible, and avoid fast movements that can scare your fish.

Vacuum the gravel bottom

A gravel vacuum or aquarium siphon is a super useful tool that will help you take dirty water out of the tank, move it into an extra bucket, and clean the bottom of your aquarium at the same time. Over time, excess food, fish waste, biological material, and other materials accumulate at the bottom of the tank and can cause bacterial growth.

Replace the water

Once you’ve completed the cleaning, make sure the temperature of the water is ideal and that it’s conditioned with the right chemicals to lessen the shock to the fish.

How often should you clean the tank?

There is no exact schedule for cleaning your aquarium. Cleaning frequency varies from tank to tank. The answer depends on the number of fish you have, the size of your tank, and your filtration system. For the most part, you’ll need to clean your tank every one to two weeks.

Some fish owners choose to do a weekly partial cleaning and a full monthly change. Please note that the full clean does not involve a complete water change. It just means scrubbing the inside of the glass and vacuuming. This is also the time to replace your filters.

With proper care, you can keep a clean and healthy environment for your fish. Use the proper supplies and stay disciplined with your maintenance routine to enjoy a beautiful tank. Experience and discipline are key to proper fish care. Your fish will thank you for the loving care, and your home will look great, too.

Mother and son looking at aquarium
Westend61/Getty Images
How to reduce nitrates in your aquarium quickly and effectively
Get the nitrates under control for your fish
Clown fish swimming through corals in an aquarium

It’s one more thing to add to the seemingly endless aquarium checklist, but you need to stay on top of your nitrate levels. You’ll never get them to zero (though if you do, let us in on the secret), but keeping the aquarium chemicals in balance will greatly increase your fish’s life span. While not quite as dangerous as ammonia, out-of-control nitrates can kill fish. Proper testing, cleaning, and filtering will enable you to reduce nitrates and keep your fish healthy. Keep reading for more tips on how to reduce nitrates in aquariums.

Read more
How to help a bird with a broken wing
Do these 4 things right away if you find an injured bird
Vet examines a falcon's wing

It’s hard to know when to get involved in the natural order of things, and many times, you’ll want to leave Mother Earth alone and let the ecosystem balance itself. But occasionally, the opportunity to step in and make a difference really does come along. If ever you stumble on an injured bird with a broken wing, you may be able to save them without harming nature in the process.

Before you ponder how to help a poor flyer, make sure the bird is actually hurt. Some animals fake injury to lead you away from a nest. If you’re certain the avian needs help, it’s time to spring into action. Here's how to help a bird with a broken wing.

Read more
The 7 most intelligent birds you can keep as pets
These species can all learn to talk or sing to keep you company
Blue macaw looking quizzically into the camera

Birds are actually one of the most intelligent creatures and have the unique skill of mimicking the human voice. Of course, most of this is just repeating back things they've heard, but they can also learn basic commands and even understand some concepts.

If you're looking for the smartest birds, you will probably want to stick with members of the parrot family. Although many other species are quite smart, like ravens, they don't all make good pets. By choosing from this list, you can bring home a bird to play with that's friendly to humans and intelligent.
What is the smartest bird?

Read more