How To Get Crystal Clear Aquarium Water: Top 4 Fish-ful Ways

how to get crystal clear aquarium water
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How do I get my fish tank water crystal clear? Is it possible to have aquarium water that’s crystal clear? You can get crystal clear aquarium water if you do the following things.

You need to ensure that your filter is correctly set and aligned for optimum effectiveness. Ensure that the outlet is facing the correct direction so that as much water entering your aquarium as possible is getting out.

This article will take you through the basics and show you how to get your aquarium water clear and ready for use. Read on to know how to get crystal clear aquarium water.

Here is how to get crystal clear aquarium water:

Aquarium Filtration

aquarium filter with pump

You will first ensure that your filter is running as efficiently as possible. Ideally, you need to have a water flow of at least 10 gallons per hour (GPH). This is the recommended minimum for most aquariums, but some require more.

You can test your water flow by using a hydrometer or visualizing the current flow rate through your filter. If you have a live plant in the fish tank, ensure that it receives enough light and nutrients to grow properly.

A properly functioning filter system will remove any particles and other impurities from your cloudy aquarium water.

To ensure this, you need to make certain that the filter is working correctly, gaps between the media and the fish tank are not restricting the flow of cloudy water through the system, and there are no leaks. For example, if you see bubbles in your tank water or a layer of foam on top of it, there’s likely a leak somewhere in the filter system.

The next thing you need to check for is debris in your filters. If you have debris floating in your fish tank, it will be sucked into your filters and will end up in your tank water. Diatoms are very tiny algae that get sucked into filters easily. They can grow quickly on any metal surface, like metal grids or your aquarium filter pump.

Also, aquarium owners need to check for any clogging of your filters. An excellent way to do this is to place some aquarium gravel in the fish tankand look at the bottom of the filter tank. If you see a layer of tiny particles on top of the gravel, then that means that there’s probably some debris blocking your filters, or they are not working properly.

To prevent this, aquarium owner need to make sure that the filter is cleaned out regularly and are not blocked by any debris or by fish waste. Also, it’s important to change/clean out your filter media regularly since it will help keep it free from debris and keep it working correctly.

The last thing you need to check is the water flow through your filters. If you have a really large filter system in your aquarium, you need to make sure that there aren’t any restrictions when cloudy water passes through them. Also, make sure that there aren’t any leaks and that the plumbing can handle the increased flow.

Chemical Filtration

filter media for aquarium

Chemical filtration is the most common method of removing impurities from aquarium water. Chemical filtration is an effective way of removing impurities from aquarium water by using filter media containing special chemicals that break down the impurities in aquarium water. Chemical filters are also known as chemical-biological filters or simply biological filters.

The materials used by aquarium owners for mechanical filtration in aquariums are carbon, activated carbon, and zeolite as they help in retaining water clarity. The carbon and zeolite absorb ammonia and nitrite, which can be harmful to your fish.

The activated carbon and zeolite absorb the chlorine from your tap water, which helps to remove the chlorine in your tap water before it enters your tank.

An additional benefit of using a filter bagis that it reduces the nitrate level in your fish tank water. You can use tap water without worrying about nitrate levels harming your fish.

Chemical Filters

Chemical filters are great for removing impurities from your water and making it safe for you to use.

They are also great for removing toxic substances from your water, but there are a few things to be aware of when using them.

They are very effective at removing impurities from your aquarium water cloudy. They are not as strong at removing chemicals as a protein skimmer is. However, they can still be incredibly effective in removing toxic substances from cloudy water and preventing algae growth as well.

calcium crust water softener for aquarium filter

To new aquarium owners, they can remove many impurities, including heavy metals and some types of organics. They can remove pesticides, herbicides, fungicides, and even most endocrine disruptors and other organic pollutants.

They have the added benefit of being able to remove organics that are toxic to the fish. Some chemicals in plants and animals are not readily removed by regular filtration. These impurities can be dangerous for your fish but will still be present in your aquarium no matter what type of mechanical filtration you use.

They are very inexpensive and easy to set up and use. They don’t require much maintenance or upkeep, so long as you change the filter media regularly (which is a fairly simple task) and clean them often.

Fun Fact: Speaking of filters, there are many available aquarium filters you could consider purchasing for your pet fish. Visit our article on the Top 5 Best Aquarium Filters For Your Fish Tank and make your choice!

There Are Several Types Of Chemical Filters that Can Be Used In Aquariums:

1. Top-Off Filter

top-off aquarium filter without cover

The first type of chemical filter you can use is a top-off filter. A top-off filter is a piece of aquarium equipment that attaches to the top of your tank. It is designed to remove all the impurities in your tap water before entering your aquarium.

2. Protein Skimmer

aquarium protein skimmer water filter

The second type of chemical filter you can use is a protein skimmer. Protein skimmers work by using air bubbles to pull the impurities out of your water and into the air, where they can be removed from your tank with a skimming net and taken out to be discarded or recycled into other products.

This works so well because it uses air bubbles instead of mechanical action, which means there are no moving parts that wear down over time, as well as no chemicals involved that could harm your fish or cause other problems in the future.

3. Under Gravel Filter

aquarium under gravel water filter

The third method for chemical filtration is an under gravel filter (UGF). A UGF is a type of filter that is placed underneath your aquarium substrate. IGFs are also known as power filters or powerheads.

They use the same principle as a protein skimmer, but instead of using air as a skimmer does, a UGF uses cloudy water to pull impurities out of your aquarium water and into the air, where they can be removed from your tank with a skimming net and taken out to be discarded or recycled into other products.

Fun Fact: Cleaning aquarium gravel is quite a challenging task since any movement from it will make the water cloudy and murky. Avoid common errors while cleaning your aquarium gravel by reading our post on How To Clean Fish Tank Gravel Properly (Definitive Guide)!

4. External Canister Filter

external cannister aquarium filter

The fourth type of sponge filter you can use is an external canister filter (ECF). An ECF attaches to the outside of your aquarium and uses tiny green water filtration cartridges that sit inside the housing to remove impurities from your tap water before it enters your aquarium.

These are great for small tanks because they take up very little space, and they don’t need anything else attached to them to work properly.

Fun Fact: If you are looking for a quieter water filter, then check out our Quietest Aquarium Filter: 5 (Nearly) Silent Systems for more (or better) options.


You need to have a good amount of lighting in your aquarium. The lighting should be bright enough for the fish to see and for you to see. You can get a light that is adjustable to change it accordingly.

You will also need to consider the type of plants in your aquarium. You need to ensure that there is not too much light the light does not cause the plants to grow too much and start sucking up all the water. This helps in eliminating algae growth too.

You will also have to consider how you will attach this light to your aquarium. You might want to get a clamp or hook it on your aquarium easily, or you might want something else such as adhesive tape or glue so that it stays put without having too much of an effect on the water level in your tank.

Water Changes

Water changes is one of the most important things in maintaining good aquarium water quality, especially if you plan to keep fish for more than just a few months.

Water changes are significant because the water in your aquarium will constantly change as time goes by and fixes water clarity at the same time. The water will get dirty and old and need to be replaced with new clean water from time to time to keep the tank healthy and clean.

Aside from this, the fish in the tank will also need changes of water at least weekly so that they don’t die of dehydration or illness caused by poor water quality. This will also help to prevent an imbalance in your aquarium, which means no bacterial blooms.

You can also buy a filter to prevent algae growth and for your aquarium that does automatic water changes for you. These filters are very useful, especially if you have a large aquarium with many different species of fish in it.

This can be beneficial because it will make things much easier for you, especially when it comes down to keeping all these different species of fish healthy.

The main thing to remember when it comes to water changes is that you need to do them every week, no matter what. If your tap green water is bad, you should do at least a 50% change every week, but if your tap water is fine, you can probably do one to two 30% changes per week.

It depends on the quality of your tap water and how much it has been exposed to the sun in order to know how to keep aquarium water clear.

Water changes are essential for keeping a healthy tank and are very easy to do. If you want your fish to live for a long time, you will need to keep doing these changes because they are not cheap, and having a clean tank is essential for good health in any aquarium.

There are several beneficial bacteria and other microorganisms in your aquarium. To keep these bacteria healthy, you should fix cloudy water bychanging it every week.


Plants will help to keep the water clean and clear. They will break down the waste that has been absorbed into the green water.

Whilst having plants won’t prevent an algae bloom completely, they will certainly help, and if they are kept healthy then they shouldn’t make too much mess losing leaves etc.

When you have planted your aquarium, you need to make sure that you have chosen suitable plants for your aquarium and the fish. If you do not have a filter, then make sure that you leave enough space between the plants to allow them to grow. Like bacterial blooms, green water cannot be removed by fine filter floss or massive water changes.

If plants do not entirely cover your aquarium, they will grow up through it, resulting in the clogging of your aquarium filter. If this happens, you may need to remove all the plants from your aquarium.

You can also use live or fake plants when setting up a new aquarium, especially if you are setting up an under gravel filter system or if there is not enough space for large planted tanks in a home with limited space available.

Aquarium Flocculant

Aquarium flocculant is a substance added to aquarium water to help remove organic waste from the crystal clear water. If there is not enough flocculant in the green water, your aquarium will be cloudy.

To get clear aquarium water, you need to increase the flocculent you add to your aquarium.

The best way to do this is by using an Aquarium Flocculation Tablets. These add more flocculent into your aquarium so that you have crystal clear water, which will allow you to see all of the beautiful fish in your tank as they swim around and interact with each other.

You can get these tablets online or from any good fish store or pet shop, and they cost between $5 and $10 for a pack of 10 tablets which should last you for about a month’s worth of use in an aquarium of about 60 gallons (or more). You can also get them from Amazon at a much cheaper price if you search for them.

If you want to know how to get fish tank water crystal clear and don’t want to buy tablets, you can also add the flocculant to your aquarium by adding a half teaspoon of flocculant to a cup of aquarium water and mixing it up for beneficial bacteria. Then you should add this mixture to your tank and leave it to settle for about an hour before filling up the tank with water again.


These are the main things you need to know on how to make fish tank water clear. These are all very easy to do, and they will provide you with great results, especially regarding the health of your fish.

This can be done by following the steps above, with weekly water changes and flocculants. You need to do regular testing for ammonia spike, nitrite, nitrate, phosphate, and more to keep your established tank healthy and clean.

It would be best to consider getting a saltwater aquarium as they are easier and less work than freshwater when trying to get them to look good.

Last Updated: July 11, 2022

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