Shan:
Did two things that were very new to me during the past two weeks. Last Saturday, I purchased 10 Grass Carp and placed them in my 1.67 acre pond. The fish supplier stated I could probably add a few more and not risk de-nuding the pond. I'm thinking about adding 10 more. I have a lot of submerged weeds.
Second, a week ago from this past Monday, I tried my hand at applying Reward and Cutrine Plus to get rid of some of my coontail, curly leaf pondweed, and filamentous algae. Despite the weather forecasts which stated it would be sunny for Tuesday and Wednesady, it rained like crazy through Thursday. Needless to say, when I checked my pond last night, there were no signs that I killed anything. Not even close. Can rain dilute and ruin the effort? Can I spray again at this time? Shan, how long should I spray over a section of water before moving on to another area to ensure a proper amount of chemical will reach the plants under the water surface? I don't know if my failed efforts was due to my chemical mix (suggestion?), the amount I sprayed over the water, or the rain. Can you help? Thanks.