The silver carp was imported also into Arkansas in the 1970s by the state for phytoplankton control in eutrophic waters. It is very attractive for culture because it can filter very small phytoplanktors, often the kind that can produce nuisance blooms.  Silver carp can change the composition from blue-green algae to the more favorable green algae. But, by 1980 it had escaped into open waters of the Mississippi drainage.