About This Tool
### A Healthy Tank Started with Data
Maintaining a healthy aquarium requires more than just feeding the fish. Slight interactions in water chemistry can be deadly for fish and coral.
This **Aquarium Water Log** helps you track your water parameters over time. By keeping a history of your pH, Ammonia, Nitrite, and Nitrate levels, you can spot trends before they become crashes.
### Why track these parameters?
* **Ammonia (NH3)**: Highly toxic waste from fish. Should always be 0 ppm.
* **Nitrite (NO2)**: Toxic byproduct of ammonia. Should always be 0 ppm.
* **Nitrate (NO3)**: End product of the cycle. Toxic in high amounts (>40ppm).
* **pH**: Acidity level. Stability is key—sudden drops indicate a "crashed cycle".
Key Features
- **Local Storage**: Auto-saves your logs data to your browser.
- **Trend Detection**: Spot rising Nitrates before algae takes over.
- **Color Indicators**: Instant visual feedback for dangerous levels.
- **Multi-Tank Support**: Use the Notes field to tag different tanks (e.g., '10g Betta', '55g Reef').
Frequently Asked Questions
Is my data private?
Yes. All data is stored locally in your browser's LocalStorage. We do not have a database of your logs, so your water parameters are private.
How often should I test my water?
For new tanks (cycling), test daily. For established tanks, test weekly or before every water change.
What is the Nitrogen Cycle?
It's the biological process where beneficial bacteria turn toxic Ammonia into Nitrite, and then into less toxic Nitrate. This cycle is essential for fish life.