We have one of the largest Manatee viewing areas in the state. The Apollo Beach Teco power station. They are attracted by the warm waters discharged from the plant. These animals are heavily studied by at least a dozen schools and groups. Their numbers have steadily increased year after year. The Tampa Bay is a natural basin for most of the areas runoff and industrial discharges. You would think with that working against them their numbers would decline either by death or their natural instinct to migrate to better waters. Professionals are not the problem. I'm doubtful homeowners are to blame either. Notoriously cheap, the DIY types would be more likely to under apply fert to save money. This image of guys pouring bags of product into storm drains and flooding yards with liquid products just doesn't exist. I have yet to see piles of prills on sidewalks and certainly never puddles of liquid after a professional application. Funny how pictures of those supposed acts never make the news.