The Arvin-Edison Water Storage District and Wheeler Ridge-Maricopa Water Storage District boards both agreed recently to spend $2.5 million and $2 million, respectively, on efforts to rid their systems of invasive golden mussels. At its Feb. 10 meeting, Arvin-Edison’s Resource Manager Samuel Blue laid out a two-phase attack against the mussels. First, Blue plans to start with a chemical treatment called Natrix CA in March, when there is less water demand by district farmers and the temperatures are cooler. The mussels are more active in warmer water, Blue explained. He hoped the treatment would kill off 90%, or more, of the adult golden mussels.