{TAIL ~ The algal spores} are subjected to floway operating conditions so as to grow algae forming {HEAD ~ an algal turf} in the flowing water 
{ TAIL ~ The algal spores } are subjected to floway operating conditions so as to grow algae forming { HEAD ~ an algal turf } in the flowing water
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH