Not sure if this is the right spot for this. I have a guy I know with a 1acr pond stocked with brim and bass. About 8' in the middle of it and about 6 years old now. Last year and this year he is seeing this plant that is growing from the bottom through the whole pond. It goes to the surface and then along the surface. There is no filtration or air on the pond...Lots of fish in it that I dont think he feeds. Anyone got any ideas....this pond is in south Louisiana. Thanks...