Naturally Get Rid Of Nasty String Algae In The Pond

Algae are not only an aesthetic problem. In abundance, the slimy creatures deprive other pond dwellers of the air they need to breathe. So if your pond is overgrown with algae, it’s a sign of excessive nutrients.

Naturally Get Rid Of Nasty String Algae In The Pond

Nutrients can enter the water through decomposition of plants, fish food, fish feces and leaves. Tap water and rain also increasingly contain nitrates due to pollution, which “fuel” algae growth.

Especially in autumn and winter, most of the animals and plants die. They sink to the bottom and are decomposed there by microorganisms. This creates fertilizer salts that are absorbed by aquatic plants and especially by algae. Water plants and algae compete for nutrients.

This helps against string algae

  • The more aquatic plants are present, the more algae are displaced. This is especially true for underwater plants (for example, hornwort, needle cress, underwater spring star). They also increase the oxygen content of the water. Are there enough underwater plants in your garden pond?
  • We also recommend you to install a skimmer, i.e. a vessel with a sieve insert, in which impurities are caught before they sink to the bottom of the pond (and are subsequently decomposed by aquatic life). This way you eliminate the main reason for the algae plague.
  • Then you can slow down the nutrient build-up by fishing out algae, duckweed and dead plant matter over and over again. Before you compost the plant material, however, it should lie on the shore for a day, so that the animals caught along with it can save themselves in the pond.
  • You can also thin out plants that are proliferating. In this way, you prevent too many plants from dying in late autumn, being broken down by the microorganisms and thus providing nutrients again.
  • It is also very important that as few leaves as possible get into the pond. It would be possible to hang a net over the garden pond or rake the leaves together before they are blown into the water.
  • Do not fertilize around the pond (within a radius of at least 6 m). Even the smallest amounts washed into the water by the rain are enough to explosively promote algae growth.
  • By the way: the use of peat or chemicals is expensive and brings no or only a short-term improvement.
  • Last option: if all these measures are not enough, then you should remove some of the mud that has settled on the bottom of the pond. However, this is a method that puts a great strain on the biological balance of a pond. The water body needs a few months to recover from this intervention.

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