Penaeus vannamei juvenile was cultured making use of the system of treating circulation water with ozone and biofilter indoor at estuary area. The circulation water was treated with ozone and biofilter for 2h at 48-72h intervals, then aired for 2h. The water circulation among treating pond and shrimp ponds was temporarily stopped, filtering system continually ran during treating water. The quality criteria of the circulation water for the shrimp juvenile culture was controlled within suitable range for 5...