Three year old pond exploded this spring, pretty positive ID as Sago Pondweed. By June 1st the buds were out and this was thick thick in most to all of my 3 ft and shallower water. Now here the heat is on and the stuff has really fallen back. Is the summer heat dieback of the sago normal? Now I did introduce about 15 grass carp and 15# of tilapia around mid-May. Pond is 8.5 acres. Either way I'm liking the dieback of the sago. I know the stocking of tilapia was really low but it was kind of a what the heck I'll add some idea. I've seen some big bruiser tilapia at the feeders each night.