I’m confused… I just checked the CutrinePlus warning label online and found this (italics are mine):
ENVIRONMENTAL HAZARDS:
This product may be toxic to trout and other species of fish. Fish toxicity is dependent upon the hardness of water. Do not use in water containing trout if the carbonate hardness of water does not exceed 50 ppm.
Is CuprinePlus not dependent on water hardness when controlling weeds even though the effect on fish is?
