Austin begins blue-green algae treatments in Lady Bird Lake
They'll be out there Monday and Tuesday as well, using a chemical called Phoslock that is designed to bind phosphorus — a key nutrient for algae blooms — so the plants can't use it to grow. The positive test was for an area around Red Bud Isle, but the blooms that secrete the cyanotoxin that can kill animals have been found throughout Lady Bird Lake in the past.