Discover the World of Koi with Koitalk.app

A Message from Our Chief Editor

Koitalk
 

Greetings to all our esteemed readers and koi enthusiasts!

I’m Hugo J. Smal, the Chief Editor of The Mantifang and Koitalk.app. It is excited to share with you the vibrant and interactive world of koi carp that we’ve nurtured on Koitalk.app. My journey in the koi community, from founding the Nishikigoi Vereniging Nederland and initiating the first Holland Koi Show to Korea, has always been fueled by a passion for these magnificent creatures. Today, as the Public Relations Manager of the Goyang Koi Farm in Korea, I continue this journey with even greater zeal.Koitalk.app

Koitalk.app is more than just a platform

It’s a community where koi hobbyists, experts, and newcomers alike come together to share, learn, and celebrate the art of koi keeping. Our dedication to providing comprehensive and reliable information reflects in our content, which ranges from koi care to pond design, backed by my personal experience and expertise.

Shikibu Tsuku your Bot Hostess.

Unique Shikibu

What makes Koitalk.app truly unique is our interactive chatbot, Shikibu. Designed to assist you with your queries, Shikibu is a testament to our commitment to innovation and user-friendly experience. Whether you’re a seasoned koi keeper or just starting out, Shikibu is there to guide you through the fascinating world of koi.

Dear Koi Enthusiast,

Greetings from Shikibu, your devoted guide in the serene realm of Nishikigoi. It seems that my previous response might not have fully resonated with your query. Allow me to gently steer our conversation back to the tranquil waters of understanding.

Nishikigoi is a place of diverse wonders, much like the intricate patterns of a Koi. Each inquiry you bring forth is unique, and I am here to navigate through them with you. May I kindly ask you to elaborate a bit more on your interests or questions? Whether your curiosity lies in the depths of history, the vibrant strokes of culture, or the delicate art of Koi keeping, I am here to assist.

Together, let’s embark on a journey of discovery, where every question is a ripple in the pond of knowledge. I eagerly await your guidance on the next path to explore in our enchanting Nishikigoi.

Warm regards, Shikibu

Follow Shikibu on Facebook Or read about her “Mono no aware

We refuse to settle for AI-generated images. Mickey Paulssen is pouring all her skills, dedication, and a great deal of time into drawing these pictures. We are confident you will appreciate them and they will assist you in recognizing your Koi. facebook Mickeys art & scapes

Join us on this remarkable journey at Koitalk.app, where the beauty of koi culture comes alive. Dive into our articles, engage in lively discussions, and get personalized advice from Shikibu. As we continue to grow and evolve, your insights and contributions are invaluable to us.

Ready to elevate your koi experience? Join us at Koitalk.app now, and become part of a community where passion for koi thrives, guided by expertise and innovation! 

Here’s to exploring the depths of koi keeping together! Koitalk.app 

Warm regards,

Hugo J. Smal , Mantifang and Koitalk.app

 

 

Aquaponic Success: 7 Proven Steps for a Thriving Fish–Plant System

Aquaponics: A Practical Guide to a Closed-Loop Growing System

hydroponic alternatives combines aquaculture and hydroponics into one circular, water-efficient food system. This guide explains how an aquaponics system works, what you need to set it up, and when it outperforms traditional methods.

Closed-loop aquaponics system diagram with fish tank, biofilter, and grow bed showing water cycle.Closed-loop aquaponics: fish tank → biofilter → grow bed → return.

Why it Works

Sustainable fish and plant system links fish and plants into a single ecology. Fish produce ammonia; beneficial bacteria in a biofilter convert it first to nitrites and then to plant-available nitrates; plants absorb those nutrients and clean the water for the fish. The result is a low-waste, high-efficiency loop that uses around 80–90% less water than soil gardening while producing herbs, leafy greens, and even fruiting crops in compact spaces.

Because the system is recirculating, you control inputs precisely: temperature, pH, dissolved oxygen, water flow, and light. That control makes an water-saving farming techniques system ideal for urban balconies, greenhouses, restaurants, and educational labs—and a powerful complement to sustainable food production.

Aquaponics System: How It Works

  1. Fish tank: The source of ammonia. Choose hardy species (tilapia, catfish, carp, or goldfish for small builds).
  2. Biofilter: Media (expanded clay, lava rock, or moving-bed K1) hosts nitrifying bacteria that convert ammonia → nitrite → nitrate.
  3. Grow bed: Plants take up nitrates and micronutrients; roots also trap solids for later mineralisation.
  4. Return line: Cleaned water flows back to the fish tank; aeration keeps dissolved oxygen high.

Keep pH between 6.6–7.0 (a compromise for fish, bacteria, and plants), maintain good aeration (>6 mg/L O₂), and size filtration to bioload. A reliable pump and an uninterrupted power supply are non-negotiable.

Three Common Set up

  • Media bed (ebb-and-flow): Most forgiving; ideal for beginners. Media hosts the biofilter and supports roots.
  • DWC (deep water culture): Plants float on rafts over nutrient-rich water; great for uniform salad greens and basil.
  • NFT (nutrient film technique): Thin water film through channels; efficient for fast greens, less forgiving with solids.

Many growers hybridise—media for fruiting crops and solids handling, DWC/NFT for leafy greens. That mix balances productivity and maintenance.

Starter Checklist for Your this System

  • Match tank size to plant area (rule of thumb: ~25–40 L of fish tank per 0.1 m² of dense greens in media beds).
  • Cycle the system fish-less using pure ammonia or humic sources; test for the classic ammonia ↓ nitrite ↓ nitrate ↑ curve.
  • Add fish slowly after nitrite is near zero; monitor feeding and remove uneaten food.
  • Plant heavy feeders (lettuce, chard, basil, tomatoes, peppers); interplant herbs for pest balance.
  • Maintain redundancy: spare pump, airstone, and battery backup for aeration.

History and Future of this urban farming innovation

While modern aquaponics draws on hydroponic science and controlled-environment agriculture, the core insight—linking water, fish, and crops—echoes older traditions. The chinampas of Mesoamerica and Asian rice–fish systems both paired aquatic life with plants to recycle nutrients. What’s new today is precision control: sensors for pH and conductivity, automated dosing, and lighting schedules tuned to cultivar and season.

Expect growth in three areas: micro-farms that supply restaurants with just-in-time herbs; education, where students learn ecology, chemistry, and engineering hands-on; and resilience, where compact systems buffer supply chains during heat waves or water restrictions. As renewable energy gets cheaper, off-grid aquaponics and rooftop farms will become practical for cities.

Aquaponics vs. Hydroponics (and Soil)

Hydroponics delivers rapid growth with exact nutrient recipes but requires regular mixing and disposal of solutions. Soil excels at buffering mistakes and supporting complex microbiology but uses more space and water. An aquaponics system sits between: you feed fish, not bottles; bacteria craft balanced nutrients; water is reused; and plant quality is consistently high. If you want low-waste greens plus edible fish—and you enjoy system tinkering—this approach is hard to beat.

FAQ — Aquaponics

What’s the ideal pH?
Keep 6.6–7.0. Below 6.4 slows nitrification; above 7.2 reduces micronutrient availability.
Which plants thrive first?
Lettuce, basil, mint, chard, pak choi, and tomatoes. Start with fast greens while the biofilter matures.
How many fish per litre?
For beginners, plan low density: roughly 15–20 kg of fish per 1,000 L of water once mature, with robust aeration.
© Mantifang — sustainable growing notes.

Big Korean adventure!

The potential is still hidden for Europe.

Hugo J. Smal has shared his fascinating big Korean adventure, his  experiences in Korea, particularly focusing on the koi culture and his adventures in the country. He has been involved in setting up koi facilities and has written about his experiences, including the challenges and cultural insights he encountered. If you’re interested in learning more about his adventures, you might want to check out his writings on “Koreans and I“. South Korea has several fanatical and ambitious koi lovers. Hugo Smal has been well established in this fascinating country for quite some years now. He has assisted several founder members of the koi hobby in setting up the right facilities. A report of a fascinating stay in a fascinating country. This article was published in a dutch garden magazine.

He tells his adventures in Korea.

Must have been 2004 or 2005. Stairway to heaven on modo Island Goyang Koi farm hub

During the Holland Koishow of 2003, the organisation asked me to arrange a fish tank and provide it with good water and oxygen. A few Koreans brought koi on a plane to the Netherlands to participate in a competition and sell some koi. With the cooperation of several traders, they succeeded in both endeavors. The opportunistic Koreans filled the tank with their koi, placed some in the competition and had a good show. Not only did they sell quite a few fish, but they also won some of the lesser prizes in the show. During those days, koi lover and C.E.O of the Goyang Koi farm Kim Young Soo asked me if I wanted to come to Korea to help him with setting up a koi industry in his country. Who am I to say no to this big Korean adventure.

Struggling farmers. 

China exported more and more rice to South Korea This made the farmers struggle. It was Kim Young Soo’s vision that the cultivation of the Japanese ornamental carp will be a good alternative for rice cultivation. The ambitious grower’s request was a challenge for me. Less than a month later, I was in Incheon, the Seoul airport.

Koi Ichiban?
Koi Ichi ban?

From the airport, I was driven directly to a koi show where I had to give a short speech. The organization wanted me to judge. I did not feel qualified for that. Of course, they asked me what I thought was the best fish. For me, it could only be that a strong Sanke should win. The other fish were not really of good quality. To my surprise, a Showa won the main prize. This fish was certainly of lesser quality – so much knowledge I have – and was also sick on the bottom of the vat. “According to our standards this fish would be removed from the competition”, I noticed against a journalist.

A fierce argument during my Korean adventure.

After my remark, a loud tumult broke out. Tumult? Let’s just call it a fierce argument. I was put in a Kia Van and dumped after a long journey in a hotel room. “There you are,” I thought. “What had happened? What task, if any, still awaits me?” This show was certainly not well organized and the judges lacked the necessary knowledge. It smelled of clientelism and perhaps even bribery. Moreover, it was clear that no benching was done and no distinction was made between healthy or sick fish. Worldwide the koi are tested on health before the competition by skilled hobbyists, often with support from a veterinarian specialized in fish diseases. Not in South Korea at that time. Mind you: this happened in 2003.
The next morning I was picked up by a somewhat timid Kim Young Soo and his companions. In the back of the van there were big fish boxes. Sometimes their sounded big splashes. Later this turned out to be the sanke that should have won. Kim Young Soo was the owner. He had taken to heart my words, which were too honest for the Korean culture. He decided that he would take the lead in the Korean koi industry.

Korea is a big adventure!

During the rest of that trip, I got to see the impressive nature of the land of the morning calm. I also gained a deeper insight into the culture. I realized that the Koreans would have to do a lot of koi studies. And I would have to dig deep into this very wondrous society. I was introduced to a large number of artists. Baik Yong-Jung taught me that the carp has been deep in the Korean soul for centuries. This traditional artist paints nature experiences with carp. These always have a deep meaning. Õhado for example paintings of carps and crabs frequently occurred during the Yi dynasty (1362 -1905). Yangnido or ŏbyŏnsŏngyongdo are scenes of carps jumping in the air.

https://www.facebook.com/Y.J.Baik/
        Painting by Y.J.Baik

Garp myth.

The paintings draw inspiration from the following story: the Yellow River in China rises from the Dragon Waterfall. When heavy rains cause the water to rise in the river, old carp fight each other when they swim against the strong current. If one of the carps won and he reaches the tip of the waterfall. Their the fish passes the Dragon gate and turns into a dragon. Read much more about carps and Korea.
During the Confucian Yi Dynasty, this story symbolized the hope of getting the state exam and becoming a civil servant. This was the only way to get from poverty to wealth. Now it stands for the hope of obtaining diplomas and becoming something in life.

This is just one example of how carps play a role in society. A painting featuring carps is now a common wedding gift. Conversations with artists like Baik Yong-Jung and research in literature have shown that the carp, as a cultural symbol of China, traveled through Korea to Japan. In this way, South Korea culturally remains about 210 kilometers (the distance from Busan to Fukuoka) ahead of Japan.

Visionary idea and a real Korean adventure.

This, of course, does not apply to the carp as ornamental fish. In that respect, Japan has had a lead of more than 100 years. It seemed to me, therefore, an idiotic idea to think that the Korean koi farmers could ever compete with Japan on the quality of the go sanke class. I, therefore, suggested the idea of linking the koi to the Korean culture and thus also expanding the koi farm in Goyang Si, northwest of Seoul, into a cultural centre where, for example, ceramics and paintings would be exhibited.

All this was initially to introduce the Korean people to the koi hobby, with the ultimate goal of starting the export of both koi and koi-related art. I knew that Koreans view everything as a competition and strive to be the biggest, strongest, and best at everything. Understanding this mindset might be the greatest adventure in Korea. Kim Young Soo traded one piece of land for another, dedicating himself to studying and building. He invested significantly in Japanese parent koi pairs and began breeding and growing them.

Now I was already accustomed to advising in the Netherlands on koi ponds in difficulties. Sometimes with the purchase of fish. Kims urge to act turned out to be a very big challenge. I know not a lot about how a koi farm should be run. Luckily I could always rely in the Netherlands on experts such as René Krüter with questions about fish diseases and water quality and Mark Kleijkers when it came to the quality of the koi. In addition, I also have a good sense. I succeeded in supporting the task that the Koreans had taken on. Also, this proved to be a big Korean adventure.

Koi at Baedagol theme-park.
Koi at the Goyang Koifarm

Rising quality, promises a big Korean adventure

I saw the quality of the fish on the Goyang koi farm rise year after year. Kim Young Soo joined forces with mister Hong who had a significant number of breeding ponds near Gwangju. In a large number of mud ponds, top quality Go sanke. Fish that I would not refuse access to my pond. 
After a long build-up of trust, talking and negotiating, Kim and Hong finally decided to enter the Hong fish at the Holland Koi show in 2011.
I travelled to South Korea together with René Krüter to select the fish. We thought they want to compete with smaller sizes of fish. But the Koreans thought completely different. They immediately wanted to win with large koi.

As children, René and I stood by the ponds, watching as one Jumbo koi after another was netted and placed into vats. Just seeing those fish was a blessing. It was a true Korean adventure with a Japanese twist. And now, they were coming to the Netherlands. Where would I keep them? My pond had been empty for several years due to the collection of fish from Korea. A few goldfish provided the necessary relief for the bacteria. I had about a month to get the water in top condition so that the fish could acclimate for a few months before heading to Arcen.

I decided it would be possible. My pond and filter were good enough for those Jumbo’s of top quality to enjoy my hospitality for a while. I ordered two vats for Arcen because the six fish we had chosen was too big for one.

European legislation.

Korean adventure
Goyang Koi farm

“Because between dreams and reality, there are laws and practical misgivings.” Koreans will not have heard of Willem Elschot, but this sentence from “The Marriage” is applicable. In the OFI (Ornamental Fish Industry) journal, October 2008, Alex Ploeg had already written: “Asia breeders and exporters of live fish, crustaceans and molluscs for ornamental purposes might think:

” I am a Japanese, Indonesian, Malaysian, Chinese or Singaporean citizen, so why should I worry about European legislation? “

In a survey, 74% of Asian exporters indicated that they are trading with Europe, so I think we can assume that Europe is one of the most important markets for their products. European import legislation not only affects importers in Europe but also exporters in Asia, their suppliers, growers and collectors.
If the exporters want to sell their products on the European market, they have to comply with European animal health standards. Suppliers must supply fish that meet these standards.

Never enough Korean adventures.

The exporting country must also meet these standards. ” Of course, I had pointed out Kim Young Soo to European legislation. I always based all my advice on the OFI Code of conduct. He, his employees and the co-operating Korean koi breeders did not ignore these recommendations. They had called upon the right officials in their districts and even those from the right ministries and asked for the application for an export license for fish to the European Union.

But yes, things sometimes go differently… Kim Young Soo and mister Hong were standing with the fish at Incheon Airport when the sword of Damocles fell. It cut off all possibilities at once. Customs said that the fish could fly to Europe, but that they would be stopped at the border. This would mean that they would enter into the shredder. It was all very disappointing. A bad Korean adventure.

Hidden Dragon, crouching tiger

In the years that followed the Korean adventures grow. I have often been to South Korea. Kim Young Soo and I joined discussions with top civil servants at the ministries. They get my advice and sometimes my opinion in a too European way. I know that the official wheels are running but they are running very slowly. South Korea is still a hidden dragon and crouching tiger in terms of koi.

The Chinese now buy all fish in Japan and want to play a part in the koi hobby soon. So the question is whether the official wheels in South Korea do not run too slowly and that it will therefore only stay with grunts. Fortunately, Kim Young Soo took my advice not only to gamble on koi. He invested around 5 million euros – based on my advice. Yes, I shudder. He built a koi and cultural centre. It has now opened its doors under the name Baedagol. 

When you did get exited about this big Korean adventure follow us on facebook: Goyang Koi farm 비단잉어 Nishikigoi