In 2015, University of Florida scientists poured 5 gallons of red Rhodamine dye into Silver River’s main spring vent to track how water moved as the clear spring run turned more algae-green
In 2017, scientists poured Rhodamine WT pink dye into Porter Hole Sink under Florida’s Lake Jackson; 35 days later instruments picked it up at Wakulla Spring through limestone caves
In 2024, scientists dyed Peter Lake blue with Aquashade to starve algae of light, but the water still turned green, and the team suspects repeated rain kept flushing the pigment out.
In 2011, scientists injected yellow-green fluorescein dye into Maui’s wastewater wells; 84 days later, it appeared near the Pacific, supporting an underground wastewater connection