Green pond water, what now?

Is your pond water turning green and can you barely see your fish? Then you probably have too much floating algae in your pond water. This floating algae multiplies incredibly quickly, giving the water its green color. The main reasons for the development of floating algae are a nutrient surplus and/or a lack of growing pond plants.

Solution(s) to the problem: green pond water

A number of measures are needed to solve the problem of green pond water.

Pond substrate

If your pond doesn't already have pond substrate, apply a layer. Coarse pond substrate is primarily used as a biological filter material, while the finer type is ideal for growing your pond plants. Its airy structure allows the roots of your pond plants to develop optimally. Add Bacterial at the same time.

Aquatic plants

Plant more aquatic plants in your pond. Floating plants, such as water lilies, azolla, duckweed, frogbit, and water gentian, are particularly effective against green water.

Water hardness (GH value)

Make sure the overall water hardness is high enough. The water hardness, or GH value, should be at least 7 during the growing season and preferably 8 or higher thereafter. With a hardness between 7 and 13, your plants will grow better and floating algae will have less chance to multiply. You can use GH-plus to increase the GH value.

Better environment in your pond = less green pond water!

Once the above measures are implemented, your pond's environment will improve and stabilize. This will eliminate suspended algae, leaving your pond clear again. Another way to improve the environment is to install a Cross-Flow Biofill. The Cross-Flow Biofill is a complete filter without a pump that can be installed quickly. The filter has a 9-watt UVC filter.