Clear and nutrient-poor water without algae problems comes mainly from the billions of bacteria which break down pollutants. In new ponds and after the use of medications the bacterial fauna is non-existent or damaged.
With the use of special bacterial preparations you can build up a working bacteria culture in your pond and thus ensure clear and healthy water. JBL Bacto Pond contains living, highly active cleansing bacteria to break down protein, ammonium/ammonia and nitrate to prevent fish loss and to reduce algae growth. And the rule is here very simple: the more the better and an overdose is absolutely impossible.