Fish Hatchery Management - fisheries & aquaculture

44 FISH HATCHERY MANAGEMENTFIGURE 18. Piping and water flow arrangement in (A) 20-ft and (B) S-ft diametercircular tanks. The velocity and direction of water flow can be changed byswinging the horizontal pipe toward or away from the tank wall, and twistingthe pipe clockwise to change the angle of inflow. The velocity is lowest when thewater is directed downward into the tank, as shown in (n). fle bottom screenplate and external head-box (a.ro*) eliminate vertical screens and standpipes inthe center of the tank. Note that only one automatic feeder is required per tank.(fWS ptroto.)