# KOI

> KOI is a small browser koi pond. The water responds to touch, and a reel of notes covers koi varieties, pond water, feeding by temperature and a year of keeping. It is a free, independent site with no accounts, no analytics and no advertising.

Language: en-GB
Licence: none stated

## What KOI covers

- Three koi varieties: Kohaku, Sanke and Showa.
- The water figures that matter: pH, oxygen and ammonia.
- How to feed koi by water temperature rather than appetite.
- The history of nishikigoi, from rice terraces in Niigata to the 1914 Tokyo exhibition.
- Seasonal work for spring, summer, autumn and winter.

## Pages

- [Home](https://koi.danielread.co.uk/): a living pond you can touch. Tap the water to make ripples, hold to scatter food, then scroll through the pond notes.

## How the site works

- Every page is prerendered to static HTML and hydrated in the browser.
- The pond is drawn on a canvas in your browser. Water, fish and plants are generated there, not fetched.
- The site loads no third-party scripts, tracking pixels or advertising.
- The theme choice stays in local storage on your device. Clearing site data resets it.
- There is no account, no sign-in and no server-side copy of anything you do.

## Limits

- The pond notes are general guidance for a garden pond. They are not a substitute for a water test or local advice.
- Fish, planting and water behaviour vary with climate, depth and filtration.

## Development

KOI is a React 19 and TanStack Start build-time SSG site deployed on Cloudflare Pages. It serves prerendered HTML and hydrates as a single-page app. There is no request-time SSR and no API.

The build output lives in `dist/client`. Every route in `sitemap.xml` is prerendered to static HTML, then hydrated in the browser.