If you’ve been busy googling ‘how to remove algae from a fence’ of late, you’re not alone; it’s been a very damp (and dark) winter, which means it’s been near-perfect conditions for algae to thrive.

The ammonia-reeking, guacamole-green algae that fouled Timer Powers Park in Indiantown in August was 100 times more toxic than the Environmental Protection Agency deems unsafe for pets and people. But ...