Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Another Cutrine Plus Question

I use granules in shallow water as well. Sometimes it takes over a week for the FA to turn totally brown or go away.

For instance, I spot treated some FA on 3/18. On 3/25, I noticed that most had turned brown (or brownish red) but a little was still pale green. Any FA I treat is usually gone in two weeks.