All ponds will contain billions of minute bacteria. There are the helpful species that breakdown the toxic fish waste in the biological filter system, and convert it into nitrate, which is then taken up by the plants. However, there are also other bacteria that live in the pond that are opportunistic invaders of stressed and wounded fish.

These bacteria, including the species Pseudomonas and Aeromonas will infect any cut or abrasion of the surface of the fish, and can also invade the host across the gut wall during gastrointestinal problems.

Acriflavin when added to the pond will reduce the numbers of these opportunistic bacteria in the pond, thus lowering not only the chance of infection, but also the intensity of disease in already infected ponds.

Add 10 ml of Acriflavin to every 80 gallons (363 L) of pond water.