The "word" here and in my experience is to use the liquid on the floating stuff. I have had really good luck in the last few years using the granular cutrine plus before it floats to the top. I use a hand held spreader for the granular from shore to get about 12 feet out and, if very bad, will get in the flatboat to get the next 12 feet.

1 ac pond LMB, BG, RES, CC