Causes of green Koi fish pond and how to fix it

Learn more about the causes of green Koi ponds and how to fix them to support your fish farming process through the useful article below.

Currently, many people consider raising Koi fish as a fun, a passion that helps relax the spirit when tired. Therefore, issues related to the art of aquarium fish, especially Koi fish, always attract the attention of many people. Let’s Duc Binh Microbial Products find out The causes of green Koi ponds and how to fix them right here.

Causes of green Koi ponds and how to fix them

1. Causes of Koi fish pond turning blue

After a period of raising fish, many aquarium owners encounter a situation where the aquarium turns blue, clearly visible to the naked eye. The cause of the above situation is due to the appearance of algae. Many inexperienced people often fix this by taking the fish out, draining all the water, scrubbing away the moss and replace the fish with new water .

However, after just a while, the situation of algae turning the aquarium green continued to occur. A more serious mistake is that many pond owners are indifferent and subjective, thinking that the green condition of the pond will not affect the fish.

Green algae affects Koi pond water color

When algae and moss appear in the lake more and more, it will reduce the amount of oxygen needed to provide fish respiration, leading to mass fish deaths. To be able to thoroughly “treat” this “disease” that aquariums often encounter, you must start from the root causes.

See more: Causes of aquarium water being cloudy and how to make aquarium water clear

The filtering system does not meet technical standards

For a Koi fish pond project located outdoors, the filtration system plays a very important role. To maintain the clarity and balance of the water environment in the Koi pond, the filtration system must operate according to the following procedures:

• The waste suction system at the bottom and surface will be responsible for “collecting” waste and bringing it to the tank for filtering
• In the coarse filtration system, part of the waste will lose kinetic energy and settle below, part of the small residue or chemicals will continue to go to the fine filtration system
• Contains a sufficient amount of activated carbon combined with other important materials such as ceramic filter and lava, in the fine filter compartment, harmful bacteria, wastewater, fish slime,… will be removed before returning water to the lake

However, the ideal water filtration process as above will not happen if our water filtration system does not ensure the suction or push flow and the dosage of ingredients in the filter compartments is not up to standard. Especially for homemade water filtration systems, the above situation is very easy to encounter.

As long as the filtration system is not guaranteed, harmful bacteria, bad chemical composition, waste,… will have the opportunity to return to the lake and create conditions for algae and moss to grow and develop. Soon your aquarium with pure water will turn blue if using a substandard filtration system.

Excess Nitrate and Phosphate in Koi aquarium

If you raise a large number of Koi fish ponds, frequent and excessive feeding frequency will easily make the water environment in the pond easily cloudy and polluted by leftover food and feces excreted by the fish. The filtering system now works at high capacity but still does not guarantee the best results. Therefore, there is still an amount of feces and food in the water, leading to an excess of Nitrate and Phosphate, creating conditions for algae and mosses to grow strongly.

Light

Mostly, Koi fish ponds are placed outdoors because they can better meet the artistic needs, area, number of fish that can be raised, etc. At this time, the aquarium will receive a large amount of light, which has both good and bad sides.

Light creates conditions for algae and moss to grow

With adequate lighting, fish can avoid skin diseases, and the aquarium can reduce harmful microorganisms as well as algae and moss. In addition, light also helps aquatic plants in the aquarium grow lushly, adding beauty to the aquarium.

However, when the aquarium’s filtration system is having problems and the water source is polluted, light is also a good condition to accelerate the process of algae and moss growing. This is also one of the reasons why the Koi pond turns green and the solution is quite difficult, giving the owner a headache.

2. Preventive measures to prevent Koi fish pond from turning green

2.1 Construction and renovation of water filtration systems to meet standards

To have the best water filtration system for your aquarium, you need to fully ensure the following necessary parts:

• Suction part: includes bottom suction and surface suction. It is necessary to measure dimensions, calculate proportions appropriately, and choose high quality, durable equipment.
• Water thruster: creates a stable source of oxygen for fish to breathe.
• Filter part: includes coarse filter and fine filter to help clean the water before returning to the aquarium
• Anti-spill part: prevents filter tank water as well as aquarium water from overflowing when it rains.
• Exhaust part: discharges waste and residue after filtering to the outside.

Part of a water filtration system

However, supporting equipment and supplies are indispensable to create a complete water filtration system. If you are not fully equipped with the important equipment below, the filtration efficiency of the system you build will not be high:

• UV lamp: UV lamp has the effect of destroying harmful microorganisms, preventing the growth of algae and moss.
• Aerator: has the function of creating an oxygen source to supply fish’s respiratory process.
• Filter brush: removes light-weight waste that cannot settle to the bottom of the lake.
• Salt concentration and pH tester: controls the concentrations in the aquarium to take preventive measures and early fix the green aquarium situation.

2.2 Clean the aquarium regularly

Regular cleaning also contributes to keeping your Koi aquarium clean, minimizing the growth of algae, moss, and harmful microorganisms that can turn the aquarium green and put the fish in danger. To clean the lake, you can do the following:

• Clean the tank: clean the tank, clean moss and algae that stick to the tank with specialized tools that can be purchased at supermarkets, markets, fish stores, etc. Next is cleaning decorative objects such as southern islands, mini bridges, etc.
• Water supply for the aquarium: replace the water for the aquarium by withdrawing about 20% of the water in the aquarium, re-supplying clean water to replace the 20% withdrawn, which is also a part of helping the aquarium to remove dirt, residue,…
• Clean the water filtration system: if you neglect the water filtration system without cleaning it, it will lead to a situation where the filter will be turned off, unable to absorb dirt in the tank into the system or unable to filter the water before pumping it back into the tank.

Clean the Koi pond regularly

One thing worth noting when cleaning the aquarium is not to use soap or harmful chemicals because Koi fish are highly sensitive to the living environment.

3. How to fix green Koi pond water

The green condition of a Koi fish pond, if not promptly and properly resolved, will have consequences that no pond owner or fish hobbyist wants. Specifically, if the level is mild, your Koi fish will encounter some diseases such as psoriasis, dermatitis, etc.

⫸ See more: How to effectively treat aquarium water with moss!

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⫸ See more: Top products that should not be missed.

Even worse, when the fish are deprived of oxygen for a long time, it will lead to mass fish deaths. So in order to avoid this situation, you should pay attention to the causes of a green Koi pond and the necessary remedies.

How to fix a green Koi pond

Physical method

This can be said to be a quick and timely handling method. When applying physical methods, lake owners need to immediately stop feeding fish to reduce waste. Clean algae and moss in the lake by using a racket to scoop it out, then scrub it clean. Change the water in the aquarium, preferably from 25% to 30% of the water within the first 24 hours to reduce the possibility of harmful microorganisms. To inhibit the growth of algae and moss, it is necessary to adjust the Nitrogen/Nitrate content and pH to the lowest.

Check the lake’s water filtration system. If the filtration system has a problem, immediately clean it and determine the cause. Replace the entire filter system if necessary.

Biological methods

Biological methods will bring quick results and can maintain a long-term ideal living environment without affecting the health of the fish in the lake. This method will use fish that can clean the aquarium such as glass cleaner fish, pipa fish, snails, etc. In particular, beneficial microorganisms can be used in biological products to create an ideal living environment for fish. The use of beneficial microorganisms is to help treat fish feces, residue, dirt, etc. to clean the water source, reducing part of the work if the filtration system has problems.

Microbiological products for treating Koi fish pond water – Emzeo for treating aquarium water

Microorganisms can survive and live for a long time in the aquarium. Therefore, using beneficial microorganisms will be effective and maintain an ideal living environment for fish for a long time. However, if only natural microflora are used, beneficial and harmful microorganisms will coexist. Therefore, using microbial products to create a microorganism system that is only beneficial for the lake is always the top choice of lake owners and aquarium hobbyists.

4. How to use probiotics for Koi fish pond

In addition to the ability to treat green koi ponds, probiotics also have the effect of preventing the recurrence of algae, balancing the ecosystem in the pond, eliminating fishy odors and inhibiting pathogens to keep the fish healthy. Therefore, the use of probiotics needs to be expanded to achieve the highest farming efficiency.

For liquid microbial products

• Use every 3 to 10 days
• Shake well before use
• Measure the appropriate dosage according to each type of preparation (usually printed on the packaging)
• Turn on fan systems, push and pull water, and circulate pumps to evenly disperse microorganisms in the lake

Probiotics for koi ponds EMKOI – expert in treating infected koi pond water green

For powdered microbial products

• Use every 10 to 15 days
• Sprinkle the appropriate amount into the water filter tray
• Drain water into the filter tray so that microorganisms can disperse evenly

5. Note when finding out the causes of green Koi fish ponds and how to fix them

Notes when handling a green Koi pond

In order to achieve the best results in raising Koi fish for business or ornamental purposes, you need to pay attention to the following causes of green Koi ponds and effective remedies:

• Choose quality drugs and microbial products, provided from reputable locations.
• When using probiotics, the water in the lake will turn yellow or red. Don’t worry, after a few days the water will be clear again, so absolutely do not change the water during this time.
• Probiotics can be added directly to the tank, it will not be dangerous if fish eat it.

6. Basic principles to help keep Koi ponds from turning green

A cloudy, green, fishy Koi pond is a common phenomenon. How to avoid this situation? Below are some basic principles to help you ensure clean water and a safe living environment for Koi fish:

• Raise the number of fish appropriate to the pond area. The correct density of fish not only helps them have a comfortable, safe living environment, grow quickly, minimize the risk of disease, but also minimize the situation of the lake becoming cloudy and green… Experience shows that when Koi fish grow about over 30cm, people should separate the pond.
• Feed the fish in just the right amount, absolutely do not overfeed because excess food will make the pond water cloudy and gradually turn green.
• Koi ponds need to be cleaned periodically to remove disease-causing microorganisms and some factors that cause the pond to become cloudy and green
• Raising aquatic animals in a Koi pond or raising more fish to clean the tank is a wise solution. They will replace humans in cleaning the tank, eliminating harmful microorganisms in the water environment. 
• Clean the aquarium periodically to remove factors that cause cloudy or blue water
• People should use quality filters for aquariums. Note, the filter also needs to be cleaned regularly and properly so it can operate at maximum capacity.
• If moss or dirty trash appears in the pond, you need to pick it up and clean the pond immediately to avoid polluting the water source in the pond. 

People need to note that there are many different ways to handle green and cloudy Koi ponds. Each method has its own advantages and disadvantages, so you need to learn carefully before applying. In particular, utilizing Emzeo microbial products to treat ponds and lakes is always highly effective, safe for humans, environmentally friendly, and creates the best conditions for Koi fish to grow and develop. 

7. A reputable place to provide probiotics for Koi fish ponds

Hopefully with the above sharing, you understand the cause of the Koi fish pond turning green and the effective way to fix it is with probiotics. The question is, which address provides reputable, quality products? Don’t worry, come to Duc Binh microbiological products, they I will provide you with the best biological products to support the fish farming process.

In addition, you can find other products to support the livestock and farming process at the website: chephamvisinh.vn or contact hotline: 0934.214.579 for more detailed purchasing advice and support.

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