Instant PDF download · Secure checkout
Koi Pond Care · Volume One

A koi pond that stays clear, without the forbidden-hack framing

Yuki's Koi Pond Secrets · A self-cleaning setup, Japanese-style feeding, and the mistakes that kill koi in week one

90 pages. Every claim checked: a DIY filter that is honest about its limits, food that supports health but never replaces medicine, and the legal warning on two popular pond plants most guides leave out.

Cover of Yuki's Koi Pond Secrets by Yuki Tanaka
Buy now — $26.99

Instant PDF download. No account. No password. Nothing ships.
$26.99 once · yours to keep

See what’s inside ↓
01

How it works

Three steps, about thirty seconds, no account to make.

1

You pay

Secure checkout through Gumroad. Your card details never touch this site.

2

The book opens

On the very next screen you get the download link. It works on a phone, tablet or computer.

3

It stays in your inbox

The same link arrives in your email receipt, so it is there the next time you cook.

Nothing ships. There is no account, password or app to install.

02

Look inside

Real pages from the real book — this is exactly what opens on your phone.

A chapter opens with the plan and a photo from a real pond.
A chapter opens with the plan and a photo from a real pond.
A DIY filter build, with honest limits stated alongside the steps.
A DIY filter build, with honest limits stated alongside the steps.
Water parameters and feeding temperatures, as a chart you can keep open.
Water parameters and feeding temperatures, as a chart you can keep open.
The fix-it table: the sign, the likely cause, the fix.
The fix-it table: the sign, the likely cause, the fix.

← swipe to see more pages →

03

Everything you need, nothing you have to guess

The book that sits open on the counter, with the amounts, the order and the reason for each step.

Thirteen mistakes that kill koi in week one — the real mechanism behind each one, and the fixCH. 1
The nitrogen cycle, in plain terms — why a pond has to be cycled before fish go inCH. 2
Settling in new koi — quarantine length, and the float-and-mix method step by stepCH. 3
A DIY filter build, done right — honest about what it can and cannot replaceCH. 5
A pond that mostly cleans itself — what self-cleaning automates, and what still needs youCH. 6
Feeding through the seasons — by water temperature, not the calendarCH. 7
What food can and cannot fix — the “feed this instead of medicine” claim, correctedCH. 8
Three pond plants, compared — and the legal warning most guides leave outCH. 10
A season-by-season rhythm — spring, summer, fall and winter, tied togetherCH. 12
12Chapters
4Appendices
90Pages
13Week-one mistakes
04

Get your copy

Instant PDF, on your phone about thirty seconds after you pay.

Cover of Yuki's Koi Pond Secrets by Yuki Tanaka

Yuki's Koi Pond Secrets

Volume One · 90 pages

  • Thirteen mistakes that kill koi in the first week, and the mechanism behind each
  • A DIY filter build that is honest about what it can and cannot replace
  • Seasonal feeding by water temperature, with a safe stop-feeding range
  • The “feed instead of medicine” idea, corrected before it costs you a fish
  • The legal warning on two popular pond plants most guides leave out
  • Instant PDF, 6 by 9 inches, opens on your phone, tablet or computer
$26.99One payment · instant download
Buy now — instant download
Secure checkout · one payment, no subscription
Yuki Tanaka
Who’s behind it

Meet Yuki Tanaka

Yuki Tanaka keeps koi and favors techniques used in Japanese koi keeping: a cycled pond before fish go in, feeding by water temperature, and a filter sized correctly for the fish it holds.

Pond-keeping content online is full of absolute claims: forbidden hacks, a cheap part that fully replaces an expensive one, food instead of medicine. This book keeps the real, useful technique and corrects the overclaiming.

Every number in it, from water parameters to feeding temperatures, is given as a range where sources disagree, and cited by chapter.

05

Questions, answered honestly

Is this really different from the “hack” videos it answers?

Yes, on purpose. It keeps the real technique — a working DIY filter, seasonal feeding, plant choices — and drops the conspiracy framing and the overclaiming. A cheap filter is never claimed to perform identically to an expensive one, and no food is claimed to cure disease.

I'm new to koi. Will this work for me?

It is written for exactly that. Chapters 1 through 3 cover the mistakes that account for most early losses, the nitrogen cycle in plain terms, and how to introduce new fish safely, before anything else.

Does it tell me what to feed instead of medicine?

No, and it explains why that popular idea is dangerous: good food supports a koi's health, but no food treats parasites, infection, fungus or ulcers. Chapter 8 gives the real first steps when a fish looks sick.

Can I really keep water hyacinth or water lettuce?

Chapter 10 gives the honest legal picture: both are classified as invasive or restricted in many US states and other countries, and the book tells you to check your own state's current rules before buying either one.

What format is it, and how do I get it?

A PDF, 6 by 9 inches, 90 pages, readable on a phone, tablet or computer. Checkout is on Gumroad: you get a download link on screen and by email, so you can download it again later.

What if something is wrong with my download?

Get in touch and it will be put right. Refund terms are shown on the checkout page.

06

Save this page

Point your phone camera here and open it in your hand.

QR code for this page

Scan to visit yukis-koi-pond.vercel.app on your phone and buy whenever you’re ready.

A clear pond is a routine, not a trick.

Twelve chapters, with the reason for every step.

Buy now — $26.99Yuki Tanaka · Digital download only · Secure checkout
Buy now — $26.99