Ōtākaro Limited spokesperson Michael Parkin said no solution is foolproof.
"We are committed to stopping damage in the area."
Vandals hit the Christchurch landmark on Tuesday for the second time since it re-opened just over two weeks ago.
Thieves attacked block walls and removed 46 brass fins - designed to deter skateboarders.
Ōtākaro General Manager, John O’Hagan, said the damage was frustrating for the community.
"After all the time, money and effort [it is deeply disappointing] that someone would willingly damage this much-loved space."
He is calling on members of the public to support recovery efforts.
“These skate fins are easily identifiable, and anyone who sees one or knows anything about this senseless act should report it to Police."