hair algae

How to Control Hair Algae in Fish Ponds?

Hair algae is the most dreaded algae in outdoor fish ponds. Hair algae tends to grow in thick unsightly patches in nutrient-rich ponds. It is very difficult to remove, and can bean indication of poor aeration and water quality. The best method of controlling hair algae is prevention. The pond should be well designed for proper water flow. A good maintenance routine should be followed, with emphasis on mechanical filtration and proper feeding.

How to Get Rid of Hair Algae?

In order to remove hair algae from your pond it is vital to have a good maintenance routine, and find out what is the cause of growth. It is important to avoid stagnating water areas and to have proper aeration. Redesign or mechanical filtration may also be helpful.

Chemical Removal?

Once hair algae is present in Yorke Pond, it can be especially difficult to remove. It will coat most anything, from the rock work and substrate at the bottom of the pond, to the ornamental plants you are trying to grow. The presence of hair algae indicates a problem. The biggest mistake people make when dealing with hair algae is thinking they can fix it with chemicals. Algae destroyers definitely have their place in the Koi Pond industry, but they are not a solution to the problem that caused the algae growth. Whenever an algae destroyer is to be used, it is very important to read the label carefully. They may contain harsh chemicals that may harm your fish, plants, or the biological filter you count on to keep your fish pond healthy.

The Cause of Hair Algae

The first step to recovery from hair algae is to find out what caused the growth. It will only grow in nutrient-rich water. It also prefers slow moving to stagnant areas of the pond, as these will be the most nutrient rich. Often the cause of this algae is simply overstocking and overfeeding. Depending on your natural plant life, the biological filter can only convert so much organic waste. The rest will remain present in the form of hair algae fertilizer, waiting for something to utilize it.

Aeration is Key

The other common cause of hair algae is improper aeration. This will cause pockets of oxygen poor water in which good bacteria will not be able to grow. This will quickly lead to conditions conducive to algae growth. It can also lead to poor water quality, and soon stressful, disease-inducing conditions for your pond-fish. It maybe necessary to further aerate your pond, possibly by adding an additional water pump to create proper current.


Hair algae can be a nuisance, but if encountered, it can be a blessing in disguise. You can use this opportunity to fix a possible life threatening condition before it progresses. Use this time to evaluate your filtration, possibly adding additional mechanical filtration to remove physical waste before it breaks down. Your maintenance routine should also be examined, including your feeding regimen, and stocking density. Perhaps additional water exchanges are necessary to keep up with the bio-load of your pond. Perhaps it was a design flaw that created a poorly circulating area. This can be corrected with additional aeration or a redesign to correct the current structure of the pond. Whichever there as on for its growth, the hair algae should signify a correctable issue, and it is a much more desirable outcome than the alternative.

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