13 photos: Iowa's First Aquaculture Fish Farm

Jeff Nelson in the nursery at Iowa's First, Thursday, July 31, 2014.

Cousins Jeff and Mark Nelson formed Iowa's First in Blairsburg, Iowa, converting an empty hog confinement building Thursday, July 31, 2014.

This is the nursery for Iowa's First Aquaculture farm in Blairsburg, Iowa Thursday, July 31, 2014.

Water circulates and aerates constantly at amazing rates using opposing flows technology Blairsburg, Iowa Thursday, July 31, 2014.

Barramundi from the nursery at Iowa's First Aquaculture in Blairsburg, Iowa Thursday, July 31, 2014.

Matt Clarken checks on the size of barramundi in the nursery section of Iowa's First Thursday, July 31, 2014.

Iowa's First Aquaculture Fish Farm in Blairsburg, Iowa Thursday, July 31, 2014.

Iowa's First Aquaculture Fish Farm in Blairsburg, Iowa Thursday, July 31, 2014.

Iowa's First Aquaculture Fish Farm in Blairsburg, Iowa Thursday, July 31, 2014.

Jeff Nelson holds some of the plastic bits containing bacteria in the biofiltration system Thursday, July 31, 2014.

Iowa's First Aquaculture Fish Farm in Blairsburg, Iowa uses Opposing Flows Technology which uses air to circulate the water. These jets are part of the biofiltration system. Thursday, July 31, 2014.