Hobbies And Interests
pH
Measure the acidity of the pond using pH paper or another indicator. Acidity is measured on a pH scale of zero to 14. Zero to 7 is acidic, and 7 to 14 is alkaline, with 7 considered a neutral solution. According to Colorado State University, Clostridium botulinum is most likely to grow in water with a pH of 7. The optimum pH level for all pond life is between 7.5 and 8.5, according to Pet and Garden. If the pond registers a pH of 7, you can make it slightly more alkali by using baking soda. Start with approximately 16 oz. per 500 gallons of pond water, suggests the Artistic Garden.
Oxygen
Increase the level of oxygen in the water by adding aquatic plants that absorb carbon dioxide and release oxygen as they grow. Hints and Things suggests water lilies, marsh marigolds, water hyacinth, fairy moss, greater bladderwort and bulrushes. Colorado State University reports that Clostridium botulinum cannot grow if there is oxygen present in the area immediately next to them.
Temperature
Alter the overall temperature of the pond by adding cold water. Ideally, the lowest ideal temperature for a pond is 65 degrees Fahrenheit, says the Koi Club of San Diego. The warmer a pond is, the more habitable it becomes to both types of Clostridium botulinumis. According to Colorado State University, the optimum temperature for the growth of non-proteolytic types of Clostridium botulinumis is 86 degrees Fahrenheit. For proteolytic types, the most rapid growth occurs at 95 degrees.
Carcasses
Immediately remove any carcasses of ducks or fish in and around the pond. Healthy ducks and fish may ingest the bacteria when feeding on the maggots that are attracted to decaying bodies. According to the U.S. Aquavac, this will help prevent large outbreaks. Regularly skimming debris from the surface of the pond will help in identifying any corpses.