Brown Algae

Brown algae that grow in ponds often form a firmly attached brown layer on the pond walls. Brown algae require very little nutrients and attach to pond walls with calcium. They also require little light and can live in deep water.

Removing brown algae

If you want to make and keep your pond free of Brown algae, you can follow the tips below:

• Remove brown algae and provide adequate lighting, between 8-10 hours per day.
• Remove all decaying material from your pond and install fast-growing oxygen plants.
• Test the water for pH, if it is too high (pH 9 to pH 10), add CO2 to lower the value. Or put a little peat in your filter, this will affect the acidity of the water and thus your pH level.
• Plant fast-growing underwater plants.

If the pH is relatively low in the early morning (pH 7 – 8) and relatively high in the evening (pH 8 – 9) then the pond environment is functioning, the plants will grow well and the water will be clear.