3x barley straw bale's for natural algae treatment. 

Treats 17,000 Litres of water. Each bale treats 4,500 litres of water. It works best near running water e.g. water fall or inlet to pond. The bales can take up to a month to see results, and 6 weeks in winter. The bale's will keep algae and green water at bay for 6 months, from when put into the pond. 

Barley straw is environmentally friendly way of controlling algae.

Ponds can be difficult to calculate water volume, but with barley straw bale's you won't overdose your pond or cause harm to fish. Don't worry if you put in too many bale's. It's better to use too many bale's than not enough when controlling algae. 

Suggestion: use a cable tie to bunch the bales in your pond and place them under the water fall, as seen in one of the pictures.