Pinto Lake Alum Application

“In April, HAB Aquatic Solutions will use a barge to administer a week-long alum treatment of the lake, according to staff limnologist John Holz.

“Alum is used in most communities’ drinking water and in wastewater treatment. It’s a food-grade product,” said Holz.

The formulation forms a fluffy, cotton ball-like substance that binds to phosphorus, said Holz.

“The treatment is not toxic to the algae, but rather reduces the amount of phosphorus available for algal growth by retarding phosphorus inputs from the sediment,” Holz said.”

http://www.santacruzsentinel.com/article/NE/20170117/NEWS/170119708