MASON CITY, Iowa — Fish are dying in a northern Iowa pond because of low oxygen levels caused by an algae bloom.
The Globe Gazette in Mason City reports (http://bit.ly/1L0d3e5 ) that oxygen-deprived fish were spotted Friday at Black Pit, a 16-acre pond in Lester Milligan Park in Mason City. Dead fish were also found Saturday.
Iowa Department of Natural Resources spokesman Kevin Baskins says more fish were likely to be found Sunday as oxygen levels dropped overnight. Officials don't know if Black Pit will recover on its own or need restocking.
The same problem was blamed for thousands of dead fish on Iowa's Crystal Lake earlier this week.
Baskins says dying algae produces a substance that can be toxic to human and pets, so suspicious looking water should be avoided.
Information from: Globe Gazette, http://www.globegazette.com/