For the product label for the Lake Colorant WSP you would use the following
AQUATIC COLORANT USE RATES
Area to be treated Rate to use
1 acre-foot* (1,234 m) 1-2 packets
4 acre-feet (4,934 m) 4-8 packets
*1 acre foot = 1 surface acre, 1 foot deep or 325,857
gallons of water