How can you fix the problem of green or cloudy water in your garden pond?

Why does the water in a pond turn green or cloudy?

Green or cloudy water in a garden pond is a common problem that can be caused by various factors. One of the main culprits is eutrophication, an imbalance of nutrient levels in the water. In this section, we will examine the problems associated with eutrophication and present an effective solution: bacterial treatments.

Eutrophication and algal bloom in a pond

Eutrophication occurs when nutrients such as nitrates and phosphates accumulate in excessive amounts in the water of the pond. These nutrients are often introduced by organic waste, fish excrement, or uneaten food residue.

Excess nutrients create an environment conducive to the proliferation of algae, resulting in green or cloudy water in the pond.

Consequences of eutrophication:

• Green or cloudy water reduces the visibility and aesthetic appeal of the pond.
• Algae can suffocate aquatic plants by limiting their access to light and nutrients.
• An overpopulation of algae can lead to a decrease in the oxygen content of the water, harming the health of fish and other aquatic organisms.

Bacterial treatments to naturally eliminate algae

Bacterial treatments like Biolimpid or calcium carbonate-based treatments Calcium carbonate of the type Nautex or Champagne chalk to control algae are a natural and effective solution for reducing nutrient levels and controlling algal blooms in a garden pond.

These products contain beneficial bacteria that break down organic waste, fish excrement, and other nutrient substances present in the water. Through the action of aerobic bacteria on organic sludge, there are fewer nutrient releases and therefore less "available food" for filamentous algae and cyanobacteria in the water column.

How to use bacterial treatments in a garden pond?

• ** Choose a bacterial treatment specifically designed for garden ponds and carefully follow the usage instructions.
• Be aware that if the water in your pool is above 25°C, bacteria may be less effective due to the water temperature.
• Apply the product as recommended, usually once a week or as needed.
• Beneficial bacteria require a certain amount of oxygen to thrive, so it is important to ensure good aeration of the pond water.
• Ensure you always have a good dissolved oxygen level in your body of water to increase aerobic bacterial activity.

Tips for preventing eutrophication of a pond

• Do not overfeed fish and remove uneaten food to prevent excess nutrients.
• Avoid using chemical fertilizers near the pond, as they can run off into the water and increase nutrient levels.
• Regularly clean the pond by removing dead leaves, debris, and excess algae.