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By koisensei, 28 October, 2025

Recognizing Healthy vs. Stressed Koi

Your pond is your pride and joy—a tranquil world of shimmering color and graceful movement. But sometimes, even in paradise, things can go wrong. One morning your koi aren’t greeting you for breakfast, or maybe they’re hiding at the bottom, acting... off. Don’t panic (yet). Koi have a language of their own, and once you learn to read it, you’ll know exactly when they’re happy—and when something’s fishy.

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  • Koi Care
By koisensei, 28 October, 2025

Koi Compatibility: Mixing Varieties and Sizes

You’ve got your pond running beautifully—clear water, humming filters, and maybe a few koi already gliding like underwater jewels. But now you’re eyeing that fiery Showa at the koi shop… or that glittering Ogon that shines like molten gold. The question hits: Can I mix different kinds of koi together? And what about adding smaller ones with the big bruisers already ruling the pond?

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  • Koi Care
By koisensei, 28 October, 2025

How Many Koi Can You Keep? Understanding Stocking Density

You’ve built your pond. You’ve installed the filters. You’ve even named your first koi (probably something like Sunshine or Mr. Wiggles). And now—standing at the koi dealer—you’re thinking, “Just one more won’t hurt.”

But hold up, future pond mogul! Before you turn your backyard into a koi traffic jam, it’s time to understand the most important question in koi keeping: How many koi can your pond actually handle?

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By koisensei, 28 October, 2025

How to Acclimate Koi to a New Pond

<p>After weeks (or months!) of digging, filtering, testing, and daydreaming, the moment has finally arrived—your new koi pond is ready. The water sparkles, the plants are perfectly placed, and your filter hums like a content cat. Now comes the exciting part: adding the stars of the show—your koi!</p>

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  • Koi Care
By koisensei, 28 October, 2025

Quarantine Tanks: How to Protect Your Pond from New Fish

So, you’ve found the perfect new koi—maybe a fiery Showa with ink-black markings, or a brilliant Kohaku glowing red and white like a swimming flag. You’re excited to introduce your new prize to the pond, imagining it gliding gracefully among your other living jewels. But hold up—before you let that newcomer dive in, there’s one essential rule every koi keeper must follow: quarantine first, celebrate later.

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By koisensei, 28 October, 2025

Understanding Koi Grading and Pricing

So, you’ve fallen in love with koi—those shimmering, living jewels that glide through your pond like floating brushstrokes. You’ve seen koi for $25 at the local garden center, and others online for $2,500 (each!). What’s the deal? Are the expensive ones dipped in gold? Are the cheap ones rejects from koi school? Welcome to the fascinating—and sometimes mysterious—world of koi grading and pricing.

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By koisensei, 28 October, 2025

What to Look for When Buying Healthy Koi

So, you’ve caught the koi fever. You’ve studied the varieties—Kohaku, Showa, Sanke, Ogon—and you’re ready to bring home a few living jewels for your pond. But before you fall in love with the first fish that flashes its fins your way, you need to know what to look for. Not all koi are created equal—and choosing wisely can mean the difference between a pond full of beauty and one full of heartbreak (and vet bills).

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By koisensei, 28 October, 2025

Where to Buy Koi: Local Breeders vs. Online Sellers

You’ve done your homework. You know your Kohaku from your Showa, your Asagi from your Ogon. You’ve prepped your pond, balanced your water, and you’re ready to bring home your living jewels. But now comes the million-dollar question (or, depending on your koi addiction, maybe literally): where do you actually buy koi?

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By koisensei, 28 October, 2025

The Language of Koi Colors and Patterns: Kohaku, Showa, and Beyond

There’s something magical about koi fish—the way their colors glide through the water like moving paintings, each pattern telling a silent story. To the untrained eye, koi may just look “red and white” or “orange and black.” But to koi keepers, each fish speaks a language of artistry and tradition—a living brushstroke that dates back centuries to Japan’s rice fields and royal gardens.

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By koisensei, 28 October, 2025

Before You Buy Koi: A Complete Pre-Purchase Guide

They’re colorful, graceful, and hypnotically peaceful—koi fish are living works of art that can turn any backyard pond into a masterpiece. But before you run out and fill your cart with shiny swimming jewels, take a breath. Koi are not impulse buys—they’re long-lived, high-maintenance roommates that demand more care than your average goldfish. (And they’ll outlive your cat.)

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