REMEDY (triclopyr ester) is definitely not appropriate for aquatic-use (as with all liquid ester herbicide formulations). Ester formulations differ from amine formulations in many ways. For instance: Esters are oil-soluble and water-emulsifiable while amines are water-soluble. Esters also have much higher risk to fish and other aquatic creatures.
There is an amine formulation of triclopyr, which may receive EPA-registration for aquatic uses next year. Until then, there are no appropriate uses of triclopyr in aquatic sites.
Beyond all of this, triclopyr (and other "hormone herbicides") are almost exclusively "active" on broadleaf and woody plants - with little to no activity on grassy plants.
Hope this helps. KD