Currently, many families have a hobby of raising ornamental fish. However, yellow and cloudy aquarium water is a very common situation during the farming process. This causes fish to die because the water is polluted. Because so overcoming this situation is very necessary. The article below Duc Binh microbiological products will share with you: Why is aquarium water yellow? 3 most effective ways to handle it

3 most effective ways to treat yellow fish tanks
1. Why is aquarium water cloudy?
Determining the exact cause of turbid, yellow aquarium water is a thing very is important to help you find the right solution. According to experts and experienced people, cloudy and yellow aquarium water can be due to the following reasons:
- Excess food is one of the main causes of cloudy aquarium water. When you put too much food into the tank, if the fish do not consume it all, the leftover food will float in the water and become a source of nutrition for other microorganisms. This leads to pond cloudy water, fish can increase the risk of getting sick.
- Fish waste such as feces, urine, mucus,… are also causes of lake pollution. If you do not treat it regularly, it will accumulate and cause serious water pollution.
- The water in the aquarium is contaminated with alum, using alum-contaminated water to replace the aquarium can cause the water to turn yellow, affecting the health of fish.
- The aquarium’s filtration system is not designed properly or is damaged or has insufficient operating capacity, which causes microorganisms to fail to develop and reduces the effectiveness of water filtration.
- The waste treatment system in the lake is designed incorrectly, dirt will not be thoroughly removed and will accumulate, making the water cloudy.
- Decorations such as driftwood, rocks or artificial accessories in aquariums can fade over time, makes the water in the lake turn yellow and unsightly.

There are many reasons why aquarium water turns yellow
In addition, there are many other causes that lead to cloudy and yellow aquarium water. It is important that you know how to handle it immediately to avoid polluting the fish’s habitat. To avoid fish getting sick and dying, you can refer to the treatment measures below.
2. 3 effective ways to treat yellow aquarium water
There are many ways to treat yellow and cloudy fish tank water. However, below are the basic and most effective ways that you can apply. Specifically as follows:
2.1 How to treat yellow or cloudy fish tank water by changing the water
This is the solution chosen by most people when the aquarium water is polluted. This solution is suitable for use in cases where aquarium water is dirty due to leftover food or fish waste.
Regularly changing water is a simple, but very effective way to help maintain a clean living environment for fish, as well as prevent the water from turning yellow. This also helps remove waste, leftover food, and impurities that accumulate over time.
For small aquariums, this is not difficult. However, for large lakes, you can change the water according to the instructions below:
- First, clean the tools used to change the water in the aquarium.
- After that, you proceed to pump the water out of the lake. You should note that should only withdraw less than 50% of the water to avoid shock to the fish the environment.
- The next step is for you to clean the bottom of the lake, with water filtration system in the lake. In this step, you need to pay special attention to cleaning algae at the bottom of the lake.
- The final step is to add new water to the aquarium to match the original amount of water. Besides, you need to measure salt concentration and temperature so that the fish can immediately adapt to the new environment.

Changing water is one of the solutions to handle yellow fish tanks, the amount of water changed should not exceed 50%
Notes when changing aquarium water:
- You should not use suddenly cold water or water containing chemicals.
- You should combine water changes with vacuuming the bottom of the lake to remove leftover food and feces. Because, this is the main reason why aquarium water quickly turns yellow and cloudy.
2.2 Treat yellow and cloudy aquarium water by replacing the aquarium with a new filter
If the aquarium water is yellow and cloudy due to a problem with the filtration system, the next solution is to replace the filter. The filter plays a very important role in maintaining water quality in the lake, helping to remove suspended solids and at the same time release organic substances, to improve the condition of yellow and cloudy water.
This system is one of the indispensable solutions for fish to live and grow. Accordingly, aquarium filters need to ensure the following standards:
- The filter needs to have 2 parts: fine filter (handles small impurities) and coarse filter (removes large residue in water) operates stably.
- The filtration system needs to be able to remove tall residue, as well as pollutants accumulated in the aquarium and at the same time ensure stable, continuous operation. custom
- Make sure the aquarium filter has both an internal and external push system, to enhance water circulation and circulation.
- The filter flushing system must be able to perform the function of flushing periodic flushing to be able to clean the membrane filter and discharge the main pond, to remove accumulated impurities and help maintain clean water quality, limiting the phenomenon of yellow water.
In addition, you also need to note the following when using an aquarium filter:
- The filter should be cleaned periodically, but avoid washing too hard so as not to damage the structure of the filter material.
- You should only lightly rinse the filter layer with water from the aquarium, to retain beneficial microorganisms.
- You should remember to absolutely not wash the filter with water, because chlorine in the water can kill beneficial microorganisms in the water filtration system.
2.3 Treat yellow aquarium water with EMZEO probiotics for Duc Binh aquarium fish
In addition to the two ways to handle yellow aquariums above, the important main solution is to create a better living environment for fish. Accordingly, you need to add beneficial microorganisms to the aquarium. That’s why, the practice of treating contaminated aquarium water with probiotics is applied by many people. This is a simple, safe, convenient method that gives quick results. Currently, EMZEO for Duc Binh ornamental fish is a biological product that helps treat yellow fish tank water and create microorganisms very effectively. The product is trusted by many customers.
2.3.1 Uses of EMZEO for Duc Binh ornamental fish
EMZEO Duc Binh ornamental fish is a very popular product because it is much faster and more convenient to use than the solution of changing aquarium water. This biological product has many uses such as:
- Creating microorganisms for the aquarium so that fish have better living conditions
- Removes algae and removes fishy odors in water
- Decomposes leftover food, fish waste, organic humus
- Treating aquarium water and Koi fish that are polluted, cloudy, green or yellow.
- Absorb, treat toxic gases that may be present in the aquarium such as NH3, NO2, H2S,…
- Inhibits the growth of pathogenic microorganisms and destroys them
- Provides the lake environment with useful microorganisms.
- Thanks to EMZEO Duc Binh probiotics, you do not need to change the water regularly. Therefore, the fish will not suffer from shock due to having to adapt to the new environment.
- Protect the environment and create feng shui landscape for the surrounding scenery.
- EMZEO probiotics are safe for the environment, humans and pets.
With the above great effects, you don’t need to worry about the fish tank turning yellow. Probiotics for aquarium water treatment Emzeo will solve all these problems quickly.

Emzeo Duc Binh ornamental fish is the most effective in treating yellow aquariums today
2.3.2 How the probiotic Emzeo works for aquarium fish
Minerals in probiotics will directly absorb fishy substances, toxic gases, moss and algae… Probiotics and enzymes in biological products will decompose leftover food, fish waste and newly absorbed compounds. Useful microflora is also capable of inhibiting and eliminating rotting and harmful microorganisms as well as fungal diseases that harm fish.
2.3.3 How to treat yellow aquarium water with EMZEO for Duc Binh ornamental fish
To treat yellow and cloudy fish tank water, follow the steps below:
- First, sprinkle probiotics Emzeo fish scene into the water filter tray with a dosage of 5 grams of Emzeo can treat 100 liters of aquarium water (maintain 5 grams to treat 150 – 200 liters of water).
- Next, you turn on the rinse water pump into the filter tray so that the probiotics spread evenly everywhere in the lake, within 3-5 hours.
- Turn off the pump for about 2-3 hours to let the dirt settle to the bottom.
- Next, you proceed to siphon the bottom to handle all the dirt deposited at the bottom and add more water.
- In case the water in the aquarium is too dirty, you can use more yeast than to treat it.
- Regular treatment from >Every 10 – 15 days.

Using Emzeo probiotics is a solution to yellow aquarium water
When using EMZEO for aquarium fish, you need to pay attention to the following issues:
- When newly treated, EMZEO probiotics will be dispersed throughout the tank. Therefore, the fish pond will be milky white and the water will become clear after 3-5 days.
- Using EMZEO probiotics, you do not need to perform water changes. You just need to add more the amount of water was lost.
- 1 packet of 200gr probiotics can treat 5m3 lake water. If processed periodically, you will use 200gr for 7-10m3 of water.
- If you use EMZEO for ornamental fish to treat cloudy or yellow aquarium water, you do not need to use another type of probiotic. Only EMZEO Duc Binh probiotics have shown very effective
- In addition, by treating fish ponds with EMZEO for ornamental fish, you do not need to take the fish out of the pond.
3. Some measures to help limit fish tank water turning yellow and cloudy again
You can treat yellow and cloudy aquarium water with many different methods. However, many people wonder how to prevent this situation from repeating. because if you do not know how handle then the situation of polluted aquarium water will repeat frequently and it will take you a lot of time to treat it.
To minimize the problem of fish tank water turning yellow and cloudy again, you need to note a few things below:
- The filtration system should be regularly checked, as well as cleaned regularly to ensure proper operation define.
- Change some habits when caring for fish and control influencing factors so they have a better living environment. For example, only put a moderate amount of food into the lake to avoid excess food causing the water to become cloudy.
- Raising aquatic flora helps absorb excess nutrients, as well as limit algae growth. At the same time, they also help stabilize the water environment, creating a natural ecosystem for fish.
- Inoculate the aquarium with useful microorganisms
- If possible, you should regularly change the aquarium water (especially small aquariums)
- Do not leave the aquarium in a place exposed to direct sunlight.
- Should be kept with tank cleaning fish
- Restrict fish farming in lakes with too high density
- Use a siphon to suck up leftover food and fish waste.
If you regularly apply these measures, you will definitely minimize the yellowing and turbidity of your aquarium water and will repeat less frequently.

Regularly using Emzeo for ornamental fish will limit repeated water pollution
4. Conclusion
The above are shares about Why is aquarium water yellow? The 3 most effective ways to handle Chephamvisinh.vn. Hopefully you will successfully apply these measures to have a clean and beautiful aquarium. You should note that periodic lake water treatment should be carried out regularly. EMZEO probiotics for Duc Binh ornamental fish will help make the aquarium treatment process simple and save time.
Contact information
Duc Binh Biotechnology Company Limited
MST: 0108433217
Address: 57 Lane 64 Kim Giang, Khuong Dinh, Hanoi
Phone number: 024.66.55.46.86
Transaction office
Duc Binh Microbial Products – Center for Research and Application of Biological Products specializes in research, production and application of product lines: Probiotics, septic tank yeast, wastewater treatment yeast, aquatic yeast, biological products…
Address : 1B Alley 774 Kim Giang, Thanh Liet, Hanoi
Phone number: 0934.214.579
Hotline: 024.66.55.46.86
Email: chephamvisinhungdung@gmail.com
Website:https://chephamvisinh.vn
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