Ive been there, done that.
By trade I have been in the herbicide business over 30 years. I was totally convinced answers to all things are found coming out f a spray boom....Ohhhbaby...till I had pond weeds I had no idea.
Chara was terrible in my pond and I tried chemical applications early, late, on time, by the label, above label, and all around label. Net result for me was : Tired, poorer, and chara seemed to see this as grand sport.
GC have cleaned me up and now Im slowly reducing the CG population so some weeds return. My pond is 3.5 acres fyi
