1
Greenwater tank – 200 m3
• Stocked with 5,000 fingerlings
• Produces 5,000 lbs. every 6 months
• Requires daily feeding, aeration and solids 
removal
2
Clarifier and base addition tank
• Solids removed in 500 
gallon conical bottom 
clarifier
• 1/3 HP circulating 
pump used
• pH maintained at 7.5 
with daily addition of 
Ca(OH)2
3
Denitrifying tanks
• Future research for management of nitrate 
by anaerobic processes.