Can’t think how many years it’s been since I watched the Weather Channel.
I lived down there in the mid 80s. Back then they blamed the dairy/beef cattle on the north part of the lake for excessive manure.
They also blamed the Corps of Engineers for straightening out the canals that feed into the lake.
They also kind of blamed the sugar industry on the south side of the lake for dumping chemicals.
Of course the natural biology of the lake means there were blooms even when the Seminoles were there, but let’s not worry about science. It’s also why they have so many fish.