What has happened?
Visible string algae, often in dense bails looking like felt, develop if the natural competitors for nutrients, the water plants are missing totally from a pond, lacking or lacking in variety. Phosphate, the stuff algae are made out of, gets into the pond with the rain and with food and can hardly be removed. In contrast to the algae bloom where tiny protozoan give the water an even green colouring, the string algae actually indicate a rather good water quality.

What can happen?
String algae can spread very rapidly. They preferably settle in moving water such as water courses, rock fountains etc. Sensitive underwater plants are literally crushed to death.

What has to be done? You can try to 'fish out' the string algae but if that is not sufficient and you would like to clean out the pond completely try "String algae control", which will show a relatively quick improvement. The algae will disappear even quicker if additional means are applied such as stabilising the water, adding pond plants, particularly floating plants and so-called oxidising plants. For a successful treatment with "String algae control" the water hardness must be increased to at least 5° dKH with the help of "Hardness plus". (Test the water!!) "String algae control" works particularly well during the vegetation period. You can often see string algae appear already in early spring when the water is still cold but clear.

Will the string algae stay away?
Only if the lack of nutrients is permanent. A pond with fish will hardly be able to do without the odd algae cure with "String algae control". A useful help in reducing the nutrients are suitable pond substrates such as zeolite, which will remove nutrients before they become soluble.

Tip:
Exchange unsuitable pond soil rich in nutrients with suitable pond substrates.

Solution: String algae control (Blanket weed)

Viresco Aqua 10g Blanket Weed & Algae Suppressant
Natural bacterial suppressant for Blanket Weed (String Algae) and Green Water (Single-celled Algae). Viresco is also effective at breaking down organic pond floor matter. Treats up to 27,000 litres of pond or lake water. Viresco treatment will also promote resistance to fish disease and can be used on small ponds or larger lake waters. Note: Needs sufficient supply of oxygen to enable effective & prolonged growth of bacteria and to protect fish stock. Please view our pond & Lake Aerators for suitable oxygenators, if required.
£ 23.75
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Viresco Aqua 25g Blanket Weed & Algae Suppressant
Natural bacterial suppressant for Blanket Weed (String Algae) and Green Water (Single-celled Algae). Viresco is also effective at breaking down organic pond floor matter. Treats up to 67,500 litres of pond or lake water. Viresco treatment will also promote resistance to fish disease and can be used on small ponds or larger lake waters. Note: Needs sufficient supply of oxygen to enable effective & prolonged growth of bacteria and to protect fish stock. Please view our pond & Lake Aerators for suitable oxygenators, if required.
£ 49.75
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Aqua Activ: String Algae Control: 500ml treats up to 10,000 litres of pond water
	•New generation combination product •Protects surfaces of the pond from string algae fouling •Contains natural organisms •Use algaecides safely; always read instructions and product information before using •Optimal supplement: Oxygen Stabiliser
	£ 23.97
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Extract of Barley Straw: 500ml treats a 9000 litre pond for 6 weeks
	Naturally clears green water and blanketweed (string algae) from ponds. The extract works at least one month quicker than ordinary barley straw and is far easier to control. It provides the bi-product of the straw breakdown that kills algae. It is also harmless to all vascular plants and all water bourne wildlife.
	£ 15.51
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Extract of Barley Straw: 1 litre treats a 18,000 litre pond for 6 weeks
	£ 29.14
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Phosless: Filter Media Tube Set: treats up to a 10,000 litre pond
	Phosless is a natural product which reduces algae growth by binding excess phosphates. Twin tube set fits Biotec 18 and 36 filters , the Proficlear Phosphate Binder Module or can be placed directly in moving water (i.e. filter or watercourse outflow).Supplied as a combination pack including one Phosless CA media tube and one Phosless FS media tube.Phosless CA is a white, porous calcium mineral for binding phosphates and heavy metals (such as copper and lead).Phosless FS is a brown, grainy iron mineral which effectively binds phosphates and sulphide.Particularly useful during warm or summer months. Active for up to 60 days. The bound phosphate can be disposed of as a fertiliser additive to potting soil if desired.
	£ 25.85
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Phosless LM: 30 litre Bulk Set for ponds & lakes up to 600,000 litres
	For effective nutrient withdrawal and green and string algae prevention, Phosless LM is supplied in a combination pack with one bag of Phosless CA and one of Phosless FS. The use of two different materials is ideal because the binding mechanisms for phosphate are extremely complex and they can be prevented by competing reactions with other ions, low oxygen content or low PH values. The contents of the bag can be introduced wherever it can be carried away by moving water - we recommend introducing Phosless LM in the flow area of the Aqua Air 250 LM Aerator for maximum efficiency.
	£ 359.55
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