JACKSONVILLE, Florida (WTLV) -- A thick green algae bloom covered parts of Florida's St. Johns River like a carpet this weekend.
"You could draw with a stick and it was so thick," said Steve Crowder who saw the bloom both Friday and Sunday at the Florida Yacht Club in Ortega.
The St. Johns Riverkeeper says reports flooded in about blooms from Arlington all the way to Clay County.
"It depletes oxygen from the system so this is problematic for fish, shrimp and crabs," said riverkeeper Lisa Rinaman who has been busy taking samples for testing.
Algae blooms develop from chemical runoff like lawn fertilizer.
Warm weather combined with rain and runoff is a combination that feeds a bloom.