• Crystal clear ponds for healthy fish
• Works on most common pond algae
• Natural safe and effective ingredients
• Totally safe for fish, pet and wildlifeTub size available280ml treats 1260 litres500ml treats 2250 litres1000ml treats 4500 litresDirections for useAdd 100ml of Algae Control Balls & some liquid to your pond for every 450 litres.Repeat monthly for maximum effect.Algae Control Balls are totally safe for all pond life and pets.