PondPoise
The Journal
Emergency Water Changes: What to Do When Ammonia or Nitrite Spikes
A routine weekly water change and an emergency response to an ammonia or nitrite spike are not the same thing. Here's how to tell the difference and react correctly.
Feeding by Temperature, Not the Calendar: Why Overfeeding Fouls Cold Water
Overfeeding isn't just wasted food, it's a direct water-quality problem, and the risk changes with water temperature. Here's the mechanism, with worked numbers across a full temperature range.
Overwintering Goldfish and Koi Safely: Ice, Oxygen, and Winter Care
Fish can survive an iced-over pond, but only if gas exchange keeps working. Here's how to taper feeding correctly and manage ice safely, without the mistakes that actually kill overwintering fish.