Reginald Ozanne killed Star the miniature horse in February 2019.
The fund reached its aim of $50,000 before Christmas.
"Make the choice to be the one your mother loves. Make the choice to rise above it all."
The police dive squad will assist in the search.
DOC has put up signs to stop them, but people keep getting close to the edge.
She was also reportedly threatened with a toy gun.
It boasts impressive stained glass windows and an intricate mosaic floor.
32-year-old Venod Skantha has been convicted of her murder.
The 16-year-old was found dead in her bed in February last year.