subjecting said {TAIL ~ algal spores} to floway operating conditions so as to grow algae forming an algal turf in said water, said {HEAD ~ algal turf} having a surface comprising cell walls 
subjecting said { TAIL ~ algal spores } to floway operating conditions so as to grow algae forming an algal turf in said water , said { HEAD ~ algal turf } having a surface comprising cell walls
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH