Small clam proving to be big problem

When you think of clams, you generally think seafood or perhaps thoughts of a nice chunky chowder but there are clams and there are clams and the freshwater gold clam is not one to cherish and it is starting to cause huge issues in the Waikato. The clams are officially deemed an "unwanted organism" and can damage native species and clog water intakes. And at the weekend the size of the problem became much clearer after the levels at Lake Karapiro lowered. Mighty River Domain manager and Waipa's deputy mayor Liz Stolwyk was there and joins Nights to explain the scale of the problem.