Algae can be a real problem in any pond. Left unchecked, the effects can be devastating, ruining the beauty and health of your pond. It will deplete the oxygen and light from fish and pond plants, causing health problems.
There are many types of algae, including Green Water, this is made up of suspended algae cells or blooms or Blanket Weed - this is the most common form of algae, and can form a thick layer on top of the water. This cuts out essential light and oxygen to plants and fish.
Algae is often caused by an increase in sun light, and nutrients from fish waste, plant debris or increased fertilisers. When planning a pond try to place it in a spot that doesn't have too much sun to avoid an algae burst, or place trees around the area to create natural shade.