Will the Cus04 affect fish at 2.7 pounds per acre foot? I do not have any trout in my pond. Also when applying cutrine for floating algae do you apply at .6 gallons per acre foot, or per surface acre? Ex: 1 acre pond 4 ft ave depth would I use .6 gallons of cutrine or 2.4 gallons to kill the algae? How long will the cheated copper stay effective in the pond? Thanks for your help