Koi Keeping Guide ·Apr 21, 2026

Why No Two Koi Keepers Enjoy the Hobby in the Same Way

A still moment over the ponds

Understanding the Different Ways People Enjoy Koi Keeping

One of the more interesting parts of working with customers is not just seeing what they choose, but understanding why.

Two people can be looking at the same group of koi and be drawn to completely different fish — for reasons that go well beyond pattern or colour. Spend a bit of time talking it through, and it quickly becomes clear that they’re not just choosing fish — they’re approaching the hobby in different ways.

You see a similar pattern when selecting koi in Japan. Standing over the same pond, different dealers — often from different parts of the world — will pick out completely different fish.

Much of that comes down to the markets they are buying for and what their customers tend to respond to. There is always overlap — which is why everyone is keen to secure their picks early — but the differences are still there.

That difference in preference, and the thinking behind it, is something I’ve become increasingly interested in understanding. Not just in terms of the fish themselves, but in how people approach the hobby as a whole — and how that shapes the ponds they create over time.

A Small Questionnaire

To explore that a bit further, we asked customers a small number of questions about their ponds, their fish, and how their thinking has changed over time.

Most responses were concise — straightforward answers that reflected where each person currently is in the hobby. But in a smaller number of cases, people went into much more detail, describing how their thinking had developed over time and what had influenced those changes.

Taken together — particularly when looking more closely at a smaller number in detail — they gave a useful picture. Across all of the responses, it’s clear that people weren’t just describing what they had in their pond, they were describing how they thought about it.

And while every pond was different, there were some clear patterns in the way people approached the hobby.

The Koi Hobby Map

People tend to lean toward different centres of interest within the hobby — what I’ve started to think of as a Koi Hobby Map.

Most keepers will recognise themselves somewhere within this:

Collectors
Drawn to variety and the story behind the fish. The interest lies in discovering different breeders, understanding bloodlines, and building a collection with depth and context—a process that requires patience and a willingness to commit to a fish long before its final beauty is guaranteed

Growers
Focused on potential. The satisfaction comes from raising younger koi and watching them develop — body, skin, and pattern — over several seasons. Once a fish reaches its peak, it may be moved on to begin the process again.

Engineers
Interested in the system as much as the fish. Filtration, flow rates, water parameters — these become part of the enjoyment. The pond is something to refine, adjust, and improve.

Designers
Thinking about the pond as a whole. The fish, the water, and the surroundings are all part of a single visual outcome. Each koi contributes to that balance.

Observers
Drawn to the quieter side of the hobby. Time spent watching the fish, noticing behaviour, and simply being around the water is where most of the enjoyment comes from.

Social Keepers
Enjoying the connection the hobby brings. Visiting other ponds, attending shows, or sharing the pond with friends and family — the fish become part of a wider experience.

Generalists
Drawn to the diversity of the hobby. The enjoyment comes from combining different varieties, colours, and scale types into a single pond. The challenge is not in specialising, but in maintaining a collection that feels varied without becoming disjointed.

Most people don’t sit in just one of these. Over time, they tend to move between them — sometimes gradually, sometimes quite abruptly.

Clarity Often Comes Later

In the early stages, there is a lot to take in. The sheer volume of variables can be daunting.
Water quality, feeding, seasonal changes, health challenges — much of it is learned through experience. That often includes mistakes. Treatments used a little too late. Stocking levels pushed a little too far. Pond systems that, in hindsight, weren’t quite adequate for what was being asked of them.

Those moments are frustrating at the time, but they tend to shape understanding more than anything else.

Not everyone arrives at the hobby in the same way.

In some cases, the starting point isn’t a deliberate decision at all. It might be a pond that comes with a house move — something that’s already there, with fish already in it. That was how we ended up with our first pond.

In those situations, the early stages are often less about planning, and more about understanding what’s already in front of you. Learning how to manage the pond, how the fish behave, and building knowledge from there.

As a result, the direction often takes longer to form — but when it does, it tends to be grounded in a much deeper understanding of the pond itself.

Planning helps — often more than people realise — but even with good planning, there is still a learning curve. The first few years are rarely about getting everything right. They are about learning enough to begin making better decisions.

As that understanding builds, what the keeper wants begins to change as well. Fish that once stood out start to look different. Preferences become clearer. A keeper starts to recognise what they are genuinely drawn to — whether that’s the simplicity of a strong Kohaku, or the quieter, more settled feel of a softer-toned pond.

And then, at some point, the focus changes more fundamentally.

From Adding to Editing

Early on, the instinct is to build the pond up.

More fish. More variety. More interest.

Each new addition brings something with it — a new pattern, a new colour, a new point of focus.

But over time, that approach begins to feel less satisfying.

The question changes.

Not “what can I add?”
But “what actually belongs here?”

That shift — from adding to editing — is one of the most important stages in the hobby.

It’s also one of the most difficult.

We recognise that letting go of a fish is often the hardest part of the hobby, especially when it has history, or when it was once a favourite.

At the same time, not every decision is purely practical. Most ponds have one or two fish that keep their place for reasons beyond pattern or quality — history, sentiment, their behaviour, or simply familiarity.

But as the direction of the pond becomes clearer, so does the importance of consistency.

In many cases, this is where a pond starts to take on a real identity.

Starting with the Pond in Mind

For some keepers, the pond itself becomes the starting point of the hobby.

Some people arrive at that point gradually. Others begin with a clearer intention from the outset.

In those cases, the pond is built with a specific purpose in mind.

A grow-on pond is designed around development — high turnover, strong filtration, younger fish selected for what they might become over time.

A formal pond, often raised and sometimes with viewing windows, is built for visual impact. Fewer fish, but each one chosen to hold its own within a more controlled setting.

A natural pond is designed to sit within the garden. Rocks, planting, and water movement are arranged so the whole thing feels settled into its surroundings. These ponds often favour varieties like Ochiba, Soragoi, or more subdued Goshiki — fish that don’t dominate the space, but sit comfortably within it.

What becomes apparent over time is that the pond itself starts to shape the thinking behind it.

A formal pond encourages a preference for structure and clarity.
A natural pond encourages a preference for subtlety and balance.

The environment doesn’t just support the fish — it influences the direction of the hobby itself.

In some cases, that influence goes beyond the pond itself. There may already be elements in the garden that shape how the pond is experienced — a tree, a line of planting, or a feature with its own history.

The pond then becomes something that sits around it, rather than something separate. The fish, the water, and the surroundings begin to work together in a way that reflects not just aesthetic choices, but the setting they’re part of.

The Shift to Intentionality

At a certain point, the focus shifts to the wider context of the pond.

At this stage, a koi is no longer chosen simply because it stands out. Every choice carries more weight, because when space is finite, choosing one fish often means passing on another. The question becomes: what does this fish contribute to the pond as a whole?
Does it bring balance, contrast, or calm?
Does it reinforce the direction the pond is moving in — or pull against it?

For a Grower, that might mean choosing a fish with the frame and skin quality to develop over time.

For a Designer, it might be a koi that anchors the composition, or provides a point of contrast that allows other fish to be seen more clearly.

For someone who enjoys the pond socially, it might be fish that are confident, responsive, and engaging when people are around.

From our side, this is where the role of the farm becomes clearer.

It’s not just about supplying healthy fish. It’s about understanding where a keeper is in that process, and helping place the right fish into the right environment at the right time.

Each koi represents a significant investment of time, space, and care while it is with us. Seeing that fish go on to thrive in a pond where it truly fits — where it contributes to something coherent — is the most rewarding outcome.

The Koi Keeper Journey

Looked at over a longer period, most people move through a similar kind of progression — even if the details vary.

It begins with the initial attraction. Discovering koi, and learning the fundamentals of how to keep them well.

Understanding develops. Colour gives way to quality. Preferences begin to form.

Attention turns to the pond itself. Filtration is improved. Flow is refined. Stability becomes more important.

And eventually, the pond is seen as a whole.

Not as a collection of individual fish, but as a single, balanced environment — something that is shaped deliberately over time.

Not everyone follows that path in the same way. But most will recognise parts of it.

The Joy of the Journey

There isn’t a single correct way to approach koi keeping.

A Grower and a Designer can make completely different choices, and both be right. What matters is not the direction itself, but how well the pond aligns with the person keeping it.

Part of the reason for that variety lies within the fish themselves. Diversity in koi came first. Over time, selective breeding has produced an extraordinary range of colours, patterns, skin and scale types — and just as importantly, a wide range of ways those qualities develop. The way beni strengthens or softens, how sumi emerges and settles, the effect of skin type, and the changing character of scale effects such as matsuba and robing all create different ways of appreciating koi.

That, in turn, gives people different ways of engaging with the hobby.

Some are drawn to the long-term development of a fish. Others to immediate impact, or to how a koi sits within a wider composition. The fish themselves invite those different perspectives.

But it doesn’t stop there.

As ponds begin to take shape around those preferences — whether that’s a grow-on system, a formal pond, or a more natural setting — the direction starts to feed back into the choices being made. The pond influences the fish, just as the fish influence the pond.

Over time, the two become closely linked.

Many keepers reach a point where their pond no longer quite reflects what they now want. That often leads to a second pond — not because the first one failed, but because their understanding has moved on.

At that stage, the hobby becomes a craft — a balance between meeting the biological needs of the koi and shaping an environment that reflects personal taste.