Our admiration and thanks to Boyce Lawrence for cleaning up what must have been a disgusting mess. However, the photo of horses in the lake as part of your article poses another problem.
"The lake has been valued for centuries by Maori for its reputed healing properties. It is also a precious ecological site." Add to that Mr Wiessing's statement, "Discharging animal waste into water was an offence."
Why on Earth are horses in the lake? Horses create waste regardless of where they are, so presumably they "discharge" at random into the lake waters.