Helping With The Bromate Issue
Marty Adams told Derek that there was a bromate issue in the reservation lake. Even though it is perfectly fine in small doses, it can be bad when there is too much of it. For one thing, it can lead to a higher risk of cancer. This is the main reason they dumped all the black balls on the Los Angeles lake!
An Elegant Solution To The Problem
Adams told him that they had to put a special solution in the lake to help with this problem. It cleans the water, but it is not supposed to remain in the sun for a long period of time. After all, that would only lead to high amounts of bromate. The shadow balls have offered an excellent solution to this mess.