❄️ Preparing the Pond for Winter

During winter, ponds often freeze and get covered with snow. It's crucial to prepare them in autumn to avoid problems with fish survival.

Main risks include:

• ☠️ Toxic gases from decaying plants, leaves, and uneaten food
• 💨 Oxygen deficiency due to ice cover
• 🌡️ Low oxygen levels in summer (in shallow ponds under 2m)
• 🦠 Bacteria and declining water quality
• 🐟 Uncontrolled reproduction of unwanted fish species

💡 Solving Oxygen Problems

Use an aerator – simple and effective. Prices start at €20. Power consumption is low (~5W).

🧪 Improve Water Quality with Lime

Spread lime along the shoreline. Symptom: red spots on fish. Usually disappear after 2 weeks. Recommended: 200kg per hectare.

🎯 Controlling Unwanted Fish

Introduce predators like pike or zander.
Avoid perch. Zanders eat small fish and rarely reproduce naturally.