Algae Starver Fresh Water (Liquid Phosphate Remover)
 
Liquid phosphate remover, reducing the phosphates to such a low level that it starves the algae, causing it to perish.  Controls the algae, leaving you with an algae free aquarium.
Directions:
 
Add 5ml to 100 litres of water every 2 to 3 days until phosphates are under control.  Then add the maintenance dose every 2 weeks.  1 litre treats up to 20,000 litres of water.