# Pond: Koi Chemistry

> Ammonia, nitrite, KH & salt

Canonical page: [https://chrome-stats.com/d/id6777459595](https://chrome-stats.com/d/id6777459595)

## Overview

- **ID:** `id6777459595`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Roman Kopaliani
- **Category:** Utilities
- **Version:** 1.6
- **Last updated:** 2026-08-18
- **First published:** 2026-06-11
- **Size:** 998 KB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/pond-koi-chemistry/id6777459595)
- **Privacy policy:** [https://daria-kopaliani.github.io/moondog/pond/privacy.html](https://daria-kopaliani.github.io/moondog/pond/privacy.html)

## Description

Brand-aware koi pond chemistry. Microbe-Lift, API Pondcare, Tetra Pond doses, EPA free-ammonia math, salt-bath safety. No subscription. Free, 48h Pro trial.

Free to download. Every Pro feature is free for 48 hours, then a single one-time unlock — no subscription, no ads, no account. Works offline.

Pond is the iOS koi pond chemistry assistant. Enter your test readings — pH, ammonia, nitrite, nitrate, KH, temperature — and get exact doses scaled to your pond volume. Brand-aware: pick the products on your shelf and Pond does the math.

Features
• Brand-aware dose math for Microbe-Lift, API Pondcare, Tetra Pond, and generics
• Test & Adjust: 6-parameter readings → brand-cited recommendations + plain-English advisories
• EPA free-ammonia equilibrium math (NH₃ from total ammonia, pH, temperature)
• KH crash warnings before pH collapses overnight
• Salt Bath calculator with 0.1% stress and 0.3% parasite targets
• Plant-safety warnings — flags when salt protocols would kill water lilies, lotus, and submerged plants
• Pond Volume estimator from length × width × average depth (rectangular or round)
• Seasonal hints — spring ammonia spikes, summer DO drops, fall leaf load, winter dormancy
• Locale-aware metric/imperial units (liters or gallons)
• Named-source citations: Pond Informer, Microbe-Lift, EPA, Play It Koi, Central California Koi Society
• Universal app for iPhone and iPad

For koi keepers who want exact doses from the products they already have. Backyard ponds 500–3,000 gallons / 2,000–10,000 liters.

No subscription, no ads, no account, no cloud. Free to download, with a one-time unlock for Pro. No subscription, no ads, no account, no cloud.

Privacy: Pond collects nothing. No analytics, no accounts, no network requests. Your settings live on your device.

## Rankings

- #1,858,416 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6777459595)